Need advice on marriage...?

I'm 24&husband's 25&have been married 4.5 years w/2 kids. Last November I found out we're pg&due in July. I had also found out he's seeing another woman. I confronted him&we split for awhile, was going to file for divorce, but then ended working things out. We're back together now. My husband swears that things are great between us&that he's not going anywhere, but something inside me tells different. This other woman (is 38 years old)&swears that she's madly in love w/my husband&texts/calls him everyday on his cell. He texts her back. I dont want this other woman in our marriage @ all&when I ask him if he stills talks to her, he said every now&then through texts&that he isn't going anywhere. I tell him that he shouldnt be talking to her cause she's 1 of the reasons why we'd problems&he just doesn't understand that he cant be friends with her. I don't know what to do anymore. I hate knowing that they're talking through text&wish that itd stop! Any advice?

do not know if you still need this reply. Assume your place as beautiful and his wife and mother of his children. Friendships can be confusing and so can anothers needs for what we do not understand. I only believe this....Do you still truly love him and want to stay married. Then do not complain or do silent treatment or murmur under your breath or nag. Tell him one last time that this is not healthy for you and your children. that if this is truly just a friend, then she can call and talk to you too, because you and your husband can both be her friend and maybe even introduce her to a good man worth her while. She may be in love with your husband, and tell her you think that is wonderful and that he finds it rather good for his ego, but she will have to take that love and focus it elsewhere.If your husband does not want to approach it that way, then let him know he is married to you yet he can get out of the marriage at anytime, as you love him and want life forever with him; that you choose to let him have his free will permanently and that you and the children can go on to a better life and he will be taking care of the kids financially. Then you can go cry in a room and whatever you do tell him with passive and peaceful words. You are in control of yourself and you want the best for you and your kids.I hope by this time you had a healthy baby and your man has figured it out.....