A guy starts dating this beautiful girl, things ar

A guy starts dating this beautiful girl, things are going well and she's so beautiful he cant even believe she's single, but she has assured him there is no one else. Finally he gets the invite and they spend the night at her place making wild passionate love until dawn. On his way to the bathroom he spots a picture laying face down, he picks it up and its a this really good looking guy, slender build, nicely groomed beard & he's immediately jealous and confronts her "so who the hell is this, too young to be your dad, I know you don't have any brothers... come on lets hear it, this ought to be good"  She says "oh no im sorry, I was going to... I didn't know how to tell you... that was me before the operation"