Should i be mad?

A girl come to the shop where my fiance works she said come here and he went up to her she ask how old he was he told her 21 she said i didnt know there were any sexy ass white guys around here im 33 he said im takin and starts to walk off and she tells him hold on and as he is walkin away she says well atleast i know where to find u now... i flipped on him not because of his response but because he let this conversation carry on instead of avoiding her period after asking him how old he was in a flirty way... i have had problems with him being shady and whose to say that this story he told me is what really happened im to a point where im confused and just tired. Idk what to say or think sorry for the rant. Any advice on this?