We used to play with each other before my sister started dating the guy that now is her husband, it was 3 years ago. Since then I've been trying for us to have fun together again but she always says no, it's from the past and she's married now. I didn't know what changed in her head but the last time I stayed at her place she asked me if I wanted her suck my cock. I was surprised, after so many tries before I wasn't expecting it. Later I found out why. My sister found out her husband was cheating on her and so I got lucky.