Part Two: Living with My [M] Sister-In-Law [F]

In the coming weeks following Part One of my experience with my sister in law, Sarah (SIL) shared with my wife that we had showered together to make sure there were no issues. My wife confirmed with both of us individually that it was “completely fine” and even celebrated the fact that Sarah was staying home more and not out with the couple of “idiots” she had been seeing after her divorce. Still, the shy side of my sister in law returned and nothing noteworthy happened in the two weeks following our encounter.

After a few days away with friends in the city, I came home completely exhausted to shower and pass out in bed in the early afternoon. An hour or so later, I was startled awak as my naked wife crawled on top of me and began to rub her soaking wet pussy up and down my half-asleep shaft. She leaned in to whisper, “I missed you” as she grabbed my now-erect penis and pushed it inside her. For the next 45 min my wife fucked the shit out of me, slapping her ass against my thighs as she rode my cock harder than I can ever remember. Both of us finished at the same time, with loud moaning and a violently shaking bed, just in time to hear her sister’s door close through our cracked bedroom door. Sarah had been gone all day and we didn’t hear the front door open to keep things muted, as we’re usually extremly respectful to avoid these instances.

Part One: Living with My [M] Sister-In-Law [F]

I’ve been married for just over two years to a partner who is a LLF (low lobido female). We manage okay, but it has always been a pain point. This past year, her older sister went through a bad divorce and moved in with us to help get back on her feet.

Both my wife and sister (we’ll call Sarah) are similar in body shape, pale skin, extremely petit/athletic body with perky A-cups, wide hips, and thick ass. Living together with her sister was rather uneventful for the first few months, until my wife began to share that Sarah had expressed frustration with finding someone new and was sexually agrivated.

My wife has always hated Sarah’s partners and expressed that she wished she could “find someone like me for her.” Jokingly, I said Sarah could always use me however she likes. My wife shocked me by saying “as long as I’m not around, go for it….” Later that evening, my wife made a joke to Sarah during dinner about them being “sister wives” and expressed a similar sentiment to Sarah saying, “feel free to take full advantage of him, if the feeling strikes.” Sarah laughed and then looked at me said “I’ll keep that in mind.”