u/Reasonable_Engineer4

For everyone asking for an update, the vacation is officially behind me, but the images, the scent, and the heavy weight of her presence haven't left my head for a single second. I hadn’t seen her in seven months, and stepping back into her orbit completely shattered whatever fragile self-control I had left.

Over the last few months, she’s put on a little bit of weight, and it honestly suits her insanely well. It’s not soft or out of shape at all; she’s just denser, more compact, and tightly packed. Her curves are heavier, more prominent, and seeing her body move around the house—practically living in a tight bikini—is driving me completely out of my mind. The sheer physical magnetism of her is intoxicating to a degree that is genuinely hard to handle.
I’ve lost count of how many times I've had to lock myself away, replaying every moment in my head just to jerk off with a desperate frenzy. But the absolute peak of this madness happened a few days ago out at her parents' weekend cottage, while we were sitting out in the quiet garden.

I was stretched out in a lounger, pretending to relax, while she sat just a few meters away, supposedly scrolling on her phone. I couldn't look away. I was completely transfixed by the sight of her skin glistening under the sun, and as the heat built between us, I literally got fully hard right there in plain sight, straining against my shorts. Realizing what was happening, I quickly shifted and pretended to close my eyes to "sleep."
Except, right through my half-closed eyelids, I caught her. She wasn't looking at her phone anymore. She was staring straight at me, her eyes locked onto the undeniable evidence of what she was doing to me. She watched me intently, completely aware, and she didn't look away or look offended at all. That heavy, silent acknowledgment broke whatever restraint I had left.
Things escalated further when I accidentally caught her changing out of her bikini into regular panties inside the cottage. She had just pulled them on, and the sight of her natural body drove me insane—she’s wonderfully a bit hairy down there, with dark tufts peeking out just slightly from the sides of her underwear. It was raw, heavy, and intensely feminine.

Since I've gotten back, I don't even know how many photos and mental snapshots I’ve kept replaying while I jerk off with her thoughts consuming me. Every signal, every lingering look, and every heavy breath tells me she wants the exact same thing. But honestly, I'm terrified. I know we are standing right on the edge of a point of no return, and crossing that physical boundary could completely shatter my marriage and tear everything apart.

It’s gotten so much worse than just daytime fantasies now; she’s crept into my dreams too. Last night, I dreamed of her back at the cottage, in that exact same bikini, walking closer to me while I sat in the lounger. I could feel the weight of her body, the scent of her perfume, and the warmth of her skin. When I woke up in the middle of the night drenched in sweat, with my heart pounding in my throat, I realized I simply can't go on like this anymore.

This obsession is draining me from the inside out. Every time I close my eyes, I see her. Every time my phone rings, I flinch, half-expecting a message from her. Honestly, I can't take it anymore—I'm on the verge of a breakdown. I don't know how to get her out of my head, and even less how to deal with the terrifying thought that this might all be a real, dangerous game just waiting to explode.

I have reached a point where I can no longer keep this locked inside my own mind. I desperately need an objective reality check on a situation that has been slowly consuming me, driving a wedge of pure, burning tension into my everyday life.

For nearly eleven years—ever since I first met my wife back in 2015—I’ve been harboring a deep, intoxicating, and increasingly desperate attraction to my mother-in-law. She is currently 55, divorced, and she is the absolute epitome of mature, heavy femininity. She is beautifully full-figured, with soft, voluptuous curves, gorgeous legs, and a very full, prominent chest. She exudes an effortless, quiet confidence, always meticulously manicured, wearing subtle, tasteful jewelry, and smelling of rich, warm perfume. Because my wife and I live and work abroad, I only see her during holidays and family visits. This distance has only served to make my desire for her grow richer, sharper, and far more demanding over the last decade. I fantasize about her constantly, and the air between us during our short visits has become so thick with unspoken heat that it is getting difficult to breathe.

Lately, I cannot shake the feeling that this intense, agonizing tension isn't just a product of my own imagination. When we gather at her family's cabin by the river during hot summer days, the boundaries we are supposed to maintain feel incredibly blurred. We come from a fairly conservative culture where modesty is expected, yet her freedom around me is striking, almost provocative. She spends nearly all of her time in a bikini, sunbathing and moving around with a complete, unapologetic lack of inhibition. When the rest of the family is napping inside or swimming far out in the river, she will seek me out. We will sit on the porch alone, sharing a smoke, with her dressed only in her damp swimwear.

She moves with a deliberate, teasing proximity that feels entirely targeted. She will lean in close to pour me a drink, or bend down directly in front of me to grab something, placing her soft curves and full cleavage literally inches away from my face. In those moments, I can feel the radiating warmth of her skin, smell her scent, and see the water droplets clinging to her body. It drives me completely insane, and the urge to reach out and slide my hands over her skin is almost overpowering. On top of that, there is a heavy, suggestive look in her eyes. She has a way of holding my gaze a second too long, or watching me when she thinks I’m not looking—something other family members have even subtly commented on, so I know I am not just imagining her eyes on me.

When we are apart, she showers me with an intense level of attention. She calls me her "favorite son-in-law," leaves hearts on literally every single social media post I share, and sings my praises to everyone in the family. Recently, while she was on vacation with my wife, she kept texting me directly, sending photos of herself enjoying the sun. The constant stream of attention feels far more intimate, private, and loaded than any standard family bond should ever be.

But the most complicated, intoxicating, and downright risky part of this dynamic involves a secret habit I’ve kept for years. I have a deep, private fixation on her worn lingerie. Whenever we stay at her house, I find myself drawn to the bathroom, secretly seeking out her freshly worn panties or bras to smell, touch, and lose myself in. I have done this during almost every visit, using them to masturbate, leaving my physical trace on the soft lace or silk before returning them to where I found them.

Over the last year or two, a pattern has emerged that feels far too deliberate to be a coincidence. In the past, her underwear was tucked away deep in the hamper. Now, almost every time we arrive, a freshly worn set of lace panties and a bra are left perfectly on display, draped right on top of the laundry bin, even though the bin is empty inside. After I use them and leave my physical trace, they disappear, only for a brand-new, freshly worn set to appear in the exact same prominent spot the very next day.

The turning point for me happened during an unexpected visit. We dropped by her place completely unannounced. When I first used the restroom upon arrival, the hamper was completely bare. We sat down in the living room, I lit a cigarette, and a few minutes later I went back to the bathroom. Suddenly, a pair of her panties was sitting right on top of the bin, waiting. It seems absolutely impossible that she hasn't noticed what I leave behind on her lace. Part of me is convinced she knows exactly what I am doing, and that leaving her underwear out is her way of silently giving me permission, feeding my obsession, and keeping the fire burning between us.

She has never explicitly said she wants me, nor has she openly acknowledged the lingerie. It remains a silent, highly erotic dance played out through lingering glances, sun-warmed skin, private texts, and left-behind silk.
I want your honest thoughts on this. Do you think she is fully aware of my secret habit and is deliberately feeding my desire by leaving her lingerie for me, or am I reading too much into a warm, free-spirited, and touchy-feely woman because my own lust has blinded my judgment? Has anyone ever crossed this line with a mother-in-law under similar circumstances, and if so, how did it end? I know the risks are catastrophic. Crossing this physical boundary could utterly shatter my marriage and tear the entire family apart, but the heat between us is becoming a force that is almost impossible to ignore.