when your not with the person you had a baby with

Brittany • 💜 Kaaliyah And Kaazhari’s Mommy 💜
What do you tell your kids when they ask you why your not with their dad? 
I'm due May 30th 2017 and honestly me and my child's father are toxic for eachother I've tried to work it out but he's failed me every time I feel  for me it's best if I move on without him and just try to co parent he's done so much damage to me and I couldn't bare him continuing that damage with my unborn daughter otw yet alone when she gets here..... I just know that I will hear this question one day in the future and I wanna kno the best way to answer it.. I grew up w/o my father and my mother didn't speak much of him... and tbh his true colors now show why he wasn't around me and my real dad barely have a relationship and it's not like he's trying to have one either 25 yrs later smh so mommies that are single etc etc What do you tell your kids when they ask you why your not with their dad?