Should I contact the mother of his other child???

CantWait88

Hey everyone, I'm 3 months pregnant with my 1st child and I'm already a single mother. The father of my child has basically shown that he wants nothing to do with us and I'm somewhat fine with that. However, he does have a 2 year old daughter and it just hit me that my child will already have a older sibling, Its been weighing heavily on me on whether I should contact the mother of his daughter since I want the kids to know each other. I've never met or spoken to her but I know her story. She went through the same exact situation with him that I'm going through now. He's active in the girls life but not as much as he should be. I feel as though she's a pretty mature person but I do think that she has some resentment towards me since she feels as though he abandoned his daughter for me. Do you guys think I should contact her? If so, should I do it now or later? Thanx