Should I be on Guard ?

My Husband has a child with another woman. We met a month after their breakup,, However we have been married for a some years now ,but it's some things that I notice on his part. He took the breakup very Hard he says she was selfish she never love him etc.... She is not the type that calls the house and start drama. I Hate to admit She's beautiful and seems not interested in him at all. He gets angry because he says the only time she calls is when she wants money. She set up an arrangement for him to put money directly in her account which was right down the street from our home. Instead he wanted to drive 20 min where she was. It so ironic that whenever he meets her to give her the money the son is not around.I notice he took recent pictures of her on his cell phone and everytime he sees her he has to touch her in some way her hand ,her shoulder,complimenting her. This concerns me should I be worried.?