My fwb recently had her little sister (f18) move into her basement. I go over at least 2 times a week with the soul intention of hooking up. One time I got there early since my friend was stuck at work so her sister let me in. I didn’t know that she could hear us fucking from 2 floors up and we sat on the couch joking about it.
Next thing I knew she was on top of me, kissing me, and stroking my cock. One thing lead to another and I carried her upstairs and threw her on the bed. She begged me to take her as hard as I take her sister as I pushed her head into the bed and fucked her prone. I lost control and my tip slipped into her ass. She screamed so I stopped but I heard her softly whisper “just take it slow”. After some lube I began to stretch her out eventually getting it in the whole way.
There is just something about seeing an ass hole stretched out for the first time that makes a guy proud.