Let me tell you this...you don't need him. He's a loser

and he wants to have sex w/ you cause it's convenient, not cause he love's you....he's already admitted to you that he's strayed on you & your marriage and he's only going to be w/ you cause of a baby? WRONG REASON!!! Leave, now...tell him to get out! STOP having sex w/ this man...he may be putting your sexual health at risk & your unborn child's health too. This guy doesn't deserve you and although it's hard to raise a kid on your own, I did it for 4 years and I got rid of the guy who got me pregnant & had been cheating on me for 2 years out of our 4 year relationship. I am so glad cause I am w/ someone who love's me for me, treat's me w/ respect and we have a child together & it's for the right reasons that we are family.
He's not worth it, trust me.