I caught my boyfriend sending pictures of his penis to his x he said only to remind her of what she lost?

He says he never wanted a response from her. but those went the only pictures about fifteen photos his dog,motorcycle,several flowers,exec.I same photos he sent to me only he didn't realize he labeled them Linda. He denied he sent the flowers & told me she kept calling,testing, bugging him constantly. That she's a cheating stalker he dumped that wont leave him alone.Believe him or not?