I hate that I feel this way...

Currently I have three girls, one from my first marriage that ended due to me discovering he had an affair that resulted in a child who is 10 months older than our daughter together...kind of devastating to find out while pregnant when you get a letter requesting a DNA test from your husband to establish paternity. I remarried and have two daughters with my current husband. In April right before Easter he moved out, saying he was going to stay at his sisters for awhile to get some space, left the kids and I and had relatively no contact with us. In June he asked if he could join me in the therapy sessions I was having, I allowed it and we began trying to work things out.  By mid July he was back in our home. Unfortunately I ended up discovering after he had moved back in that while he was gone he had not been living with his sister, but another woman who he had been having an affair with since October of 2014...and it was still going on. I was devastated. I asked him to leave which he did, and I began to contemplate another divorce. My kids were devastated to have their dad gone for a second time this year, and with my working again I needed his help with the kids so I gave in and allowed him to move back in. I now find myself pregnant again and very unhappy about it. I was very careful, required him to use condoms and used contraceptive film as a backup myself. I do not believe in abortion so I feel really stuck. I don't know if I even want to stay with my husband so having another child with him is not exactly what I'd call exciting. I feel awful that I feel this way because I know children are blessings, but at the same time I can't help but feel at the end of my rope and like this is completely unfair.