who the fuck cares if she has pics of his cock on her computer, honestly it doesnt mean much. kazooplayer, if you left a girl simply cause she had a pic of her ex's cock on her computer... then you're the one who's losing out.
i think it's already been clearly stated he is her EX get over it. they fucked they had fun, then they stopped having fun.
the two of you are currently having fun, why the fuck ruin that by getting jealous about cock size???
Personally i think your cock is a little nicer, his is bigger. but again... he is her ex so why does it matter. they broke up. she's with you. size isnt everything in life.
no matter how big a cock is, or even how good they are in bed. if two people dont get along, it's not going to last, it's not going to be a fullfilling relationship - dont ruin yours by being shallow, insecure and jealous.