I wrote here three years ago (see below). "My wife's very fuckable little sister", who I spoke of then and whose pretty little panties I jerked off into, is now just "legal" - but still off limits because I am married to her sister! Her name is Naomi and she is still every bit as sexually attractive as she was three years ago. At night, when my wife is asleep, I often masturbate furiously thinking about sliding my cock between Naomi's silk-soft thighs while sucking hard on her rose-red nipples, and then turning her face down, parting her neat little buttocks and shoving my cock deep into her her tight little arsehole (Her sister accepts that willingly and regularly, so why shouldn't Naomi?).
I love that and I know exactly how he feels; nice dress too. Spunking onto the pretty clothes of girls who, for whatever reason, are otherwise "off limits" can be a great compensation. I recently shot my load into the pretty panties of my wife's very fuckable little sister when she was staying with us. Had to wash and dry them quickly before the two of them got back from shopping!