▲ 2 r/UnethicalSexFantasies+1 crossposts

SIL fantasy

What can I say. I love my wife to the absolute moon and back. But recently we went and hungout with my sister in law and her husband and ive been having these thoughts.

Let me preface this by saying I love my wife, she is amazing, we have great sex, and i truly dont feel like anything is missing from our relationship in any aspect. Our communication is great, we dont argue, we love each other immensly. On the flip side, I love my brother in law and my sister in law. They are great to me and have accepted me into the family for some time now. They are good people and I am so happy they are together because they are great together.

Now that being said, my SIL is very attractive. This is an odd feeling for me because I don't look at anyone else in that way remotely as up until now I've only had eyes for her since the beginning of our relationship. Ive been cheated on in the past and since that hurt I haven't been able to be in a relationship and be attracted to another woman. So bear with me but this is what makes it so weird for me.

I dont want any of our situations to change but I've been having fantasies about my SIL. She is really smart and pretty. We see each other relatively often at family functions and just hanging out. My fantasy is her husband is out of town at his parents or friends in his hometown. She needs help with something at the house, so she asks my wife if i could come help with either mowing the lawn or lifting something heavy.(Now if my wife is home with me, my SIL won't try to do anything because she is smart enough that she won't try anything around anyone else unless it's just me and her). My wife has to work and says she will ask me. I say yeah I guess i can help, trying to contain my excitement at the opportunity. I dont ask if my brother in law will be there, pretending I don't care.

fast forward to me going over to help

In my fantasy this could happen over the course of several years, where maybe I go over and help a few times with my brother in law not over there and maybe my wife comes with me sometimes or maybe she stays home. I feel like my SIL wouldn't make a pass at me the first time we were to be alone. Quite frankly I don't take her as the person to ever make a pass at me but if she were to, I would probably think she is joking. If she were to ever make a pass at me I dont think i would tell my wife. But if she were to make a pass at me more than once and know I didn't say anything to my wife, then I'd know it wasn't a trap.

for this section i will refer to my SIL as Liz, my BIL as mick, myself as James, and my wife as Milly

Liz would invite me in, say hey "thanks for coming to help, James, sorry, mick is at his parents and I just really needed help with the lawn."

I would say: "no problem Liz, you know I'll always come help. Ill get the front yard first then the back yard."

Liz: "okay, yeah thank you. Let me know if you need anything"

Me: "no problem, will do."

I'd go out, mow the front yard, maybe come in at some point, if I needed to use the bathroom or something. Then I'd mow the back yard. I'd come inside after and wash up my hands and arms from the blades of grass.

Me: "hey Liz, im all done."

Liz: "nice, thank you."

Me: "you're welcome, did you need anything else before I leave?"

Liz: "no, thank you though. You're pretty dirty and you look itchy. Did you want to take a shower here before you go?"

Me: contemplating, knowing I am really itchy and knowing I've came over quite a few times now and nobody would care. Meaning mick or Billy. If they found out they'd maybe question it at most.

"Sure, id appreciate that."

I go get in the shower, she forgot to get me a towel, I forgot to ask. im in the middle of my shower

Me: "Hey Liz, can you get me a towel?"

Liz: "sure one second, did you not grab one?"

Me: "no I forgot to ask"

Liz: "no worries, here you go"

she comes in and puts the towel on the toilet. She closes the door.

I thought she leaves, but she didnt. Instead, I peek out of the curtain while the water is still running. Im trying to prevent getting any water on the floor.

I see her looking at my face, which is the only thing visible to her. She has a slight smile, more of a nervous smile.

Me: "oh sorry, I didnt know you were still in here"

Liz: "it's okay....... do you... mind if I join you?"

Me: "uh, what about micky and milly?"

Liz: "they don't have to know"

Me: "uh..... uhm..."

10 seconds pass

I notice she looks at me and smiles even more

Me: "okay"

I don't close the curtain, she keeps her eyes locked on mine. She starts to undress. Really slowly, not looking away. A look of confidence comes across her face as she gets her shirt off. She nods to me ever so slightly, and looks down at her body as if she is telling me to look at her body. I look at her, she takes off her pants, then her underwear, lastly her bra. She then comes in to the shower, we kiss a little bit. She tells me she doesn't want to get her hair wet. We trade spots. She is in the water now. She is rubbing the water on her body. I put shampoo in my hair. She starts massaging it gently into my scalp. Pulling me in every so often with a gentle kiss. We trade spots again. I rinse my hair as she grabs my dick. All the shampoo is rinsed and we trade sports again. She turns the water to the wall a little. She grabs soap and puts it in her body as I do the same. She then grabs my hands and puts them on her breasts. I massage them and the rest of her body. She moves the water back onto us. She rinses of and then trades me spots. I start to rinse and she starts to get out. She takes the towel and dries off. I finish rinsing, she grabs me another towel. She hands me the towel and sits on the toilet. She touches my hips gently, I move closer to her slowly. The towel over my head as I dry my hair. She grabs my dick and starts tugging on it. I take the towel off my head and out it around my neck. Still drying my hair but now i can see her. We lock eyes, I immediately become hard. She puts me in her mouth while staring into my soul. Those eyes, looking at me while she starts going harder and sloppier, knowing what we are doing. I start to moan her name. She moans as she sucks. I grab her gently by the chin and slow her down. I get her to stop, i grab her hand, and lead her to the bedroom. I put her on the bed laying down on her back. I start to rub her pussy as she continues to suck on my dick. I either cum her mouth, on her face, or her tits. Then I go down on her. Slowly at first, like im figuring her out and what she likes. Sucking, licking, and lingering her until she cums all over me. Then I pull her to the end of the bed, bend her over and put it in. She begs for it. Asking me to finally give it to her. I do. We both cum at the same time. Then we go on like nothing ever happened.

I truly dont know if I ever want this to happen. It's just a fantasy. If it were to ever happen, i truly wouldn't want either of our S/Os to find out. I think we are both perfectly happy in our relationships. If my SIL ever were to see this, message me if you feel the same. But if you aren't interested dont pursue it. I dont want to ruin anything any of us have together.

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u/Dry_Energy3086 — 2 days ago