I'm Obsessed With My Sister In Law

Sorry guys this isn't a sex story as such more a fantasy I want to get off my chest.

Now I love my wife but her sister is so good damn hot. She is very fit and healthy but has these big muscular thighs and and huge ass.

Now any opportunity I perv on her. Trying to get glimpses down her top or staring at her ass.

I've had sex dreams about her where she shows me an outfit she's bought for her boyfriend (police uniform) and she sucks me off wearing it, keeping eye contact the whole time. Another where I walk in her house and she's bent over the counter. She turns to me and says " for the show you have to pay", pushes me to my knees and shoves my face in to her pussy demanding that she makes me cum all over my face while laughing at me.

I did once fix her phone. Naturally looked in her album to find a couple of nudes that I often think about while masturbating. I must have cum over her more than anyone.

Anyway that's my confession. I'm desperate to be her sex slave but unfortunately it'll never happen