My husband of one month is texting is baby mother calling her baby and sexy .

I love this man but it really bothering me the way he text his ex and when talks to her he always walks away from me , I confronted him and he denied being in a sexual relationship with her saying he is just leading her on to hurt her like she did her I not believe him and what made it worst is I asked him why h calls her baby and all that he said he can call her anything he wants I am feeling so hurt. We have only been married a month I don't know what to do . An the things is I was not having this problem with him before we got married ( crying ) please help me y'all .