Wants to have a baby with my sexual partner end not my husband

I know it’s wrong that I want to have a baby for my sexual partner Vs my husband but y’all don’t know the issues I face with him constantly tearing me down on my parenting. Like this weekend he left to visit a friend girl n I’m like whatever. While he was seeing her I was seeing my partner so I couldn’t n wasn’t gone get mad bout him seeing her n possibly screwing her. So while he was gone I’m in a wheelchair mind you he wanted me to cook my son something to eat from home and not order my son any food from take out after my son was dumping me n my daddy’s piss I felt like he deserved them 5 lil burgers. He questioned my parenting I’m like buddy I never question your parenting and he’s grown cold towards our son Bc he sees me in my son n I cheated on him in the past. Y’all I want to get pregnant for my partner who by the way doesn’t want anymore babies Bc all his kids are damn near grown or grown. I get that he doesn’t want anymore but am I wrong for wanting to have his baby. He’s more mature better looking and he’s my heart Y’all tell me what I need to do.