I just fucked my sister’s boyfriend while she was at work [FM]

So obligatory this happened before the big ol pandemicerino!

My sister and I love together in a house we share rent for, it’s cushty af. Anyhow she had her boyfriend (let’s go with Steve) round and I was downstairs enjoying a cheeseboard and wine for one. My sister went off to work (works nights, I won’t disclose employment so let’s say she’s a necromancer) and her boyfriend came down to get a drink, so of course I offered him a glass of wine and a selection of tiny cheeses.

Anyhow the evening goes on and one glass of wine turns into 5 and the walls turn into moving paintings. Suddenly I feel I’m being watched so I turn to Steve and he’s just looking me up and down, undressing me with his eyes. Before I can even say anything he grabs me and starts kissing me. Frankly I didn’t resist and I grabbed his leg and kissed him while I ran my hand over his crotch. I barely remember getting there but the the next thing I know I’m choking on his dick!