Relationship after having a baby

Sarah

So it's been 3 months since I have had my beautiful baby girl and I find myself very distant from my man. Ever since my man and I have had our baby girl, his ex and his 16 year old daughter have been sending me text saying that they hate the baby, and that him and his ex are getting back together. She has been texting him about meeting at places and talking about taking showers and coming over on his birthday. Up until about a week ago, she has been torturing our relationship and the worst part is that it seems like he doesn't care about our relationship. He won't stick up for me. And in the beginning of our relationship he told me she got her tubes tied and then 3 years later I find out it was a lie. I mean he slept with her in the beginning of our relationship. Tbh I really don't want him touching me and last night he told me he notices something different about me. I feel like I'm falling out of love I just don't feel the same after everything thats been happening. Advice please and no rude comments