Please please read all this!

I posted on here before about the BM. But quickly let me brief you. I've been dating my boyfriend for 4 yrs. I just recently in the past year got introduced to his 3 daughters. He sees his kids maybe once or twice a month. Never met the BM and figured I have no reason to meet her anyway! She lives an hour away with the kids. I had my suspicions about him and her possibly messing around because of all the texts back and forth and random texts from him that would say, "So am I gonna get a big hug next time I see you?" Just really weird texts. Me and my boyfriend got engaged back in April. I'm holding off on planning the wedding for two reasons, 1. Because we're tight on money and, 2. I want to make sure things in our relationship were calm and secure. Two very good reasons. I finally opened my mouth about the two of them texting way too much. 200 texts in a week = ridiculous. I told him I didn't like it, he agreed. A few weeks ago after him not responding to texts or phone calls he ends up telling her, "It's not fair to my fiance that I talk to my ex this much." She says she won't call him back. On Halloween, my fiance went trick or treating with his kids and ex around their neighborhood. I decided not to go because I didn't really feel like meeting her - seemed pointless. She said to him when he was texting, "I thought SHE didn't like it when you text other people." He says, "I'm texting her." And goes back to texting me. She also asked when we were getting married. Like I said we have no plans yet. He tells me every time they're together she is constantly asking him for money even though she works, gets CS and 700 SSI from their one daughter and lives rent free with her mom. She's more loaded than him. It's sick but since we don't live together at the moment I'm not complaining.

Ok. Now that you're up to date. Here's the drama that I'm completely and utterly confused over. We're at my place playing video games.. Yes, I know 30 something year olds chillin' playing video games. It was Monopoly though!! haha. She starts calling, he ignores the call. She calls again, he ignores the call. She texts saying something like she's calling from the houseline and she had to tell him something important and to answer. He says no. She calls him, he ignores her. She texts him again and says, "You never had a problem talking to other girls when WE were in the same room! Answer!" He says no. (She was a big alcoholic and controlling then he cheated on her. After all that the marriage was over.) She calls two more times - ignored two more times. On the next call, even though we were playing a game, I said nicely, "Just answer cause she's gonna keep calling and it's getting annoying." He answers. To sum up the conversation: She was talking odd, like not making sense on the phone, he kept saying what is wrong with you? Are you OK? I told him I'd go in the other room to allow them to talk (while I listen of course) and he said I didn't have to but I did anyway. She starts asking why he was getting married. He said I support him in everything he does yadda yadda yadda and that he moved on and loves me. I heard him says, "You called to tell me you love me still and want to work things out? No. We weren't good together I remember what it was like. No." So she pretty much called to tell him she loved him. This woman doesn't swear at all. After they got off the phone the texts start coming. She was saying F this F that and he says to me she's pissed! I go on facebook and now I have a message from the BM, someone I never met before. She was such a bitch in how she worded everything. Asking me if me and my fiance were in an open relationship. Telling me she had "pictures" of him he sent her and they slept together, that she divorced him because he's a cheater and one girl just gets too boring for him. She said every trip me and fiance went on her and the kids were always asked first and that he could care less if he were engaged. I let him read it. He never tried to deny the sex.. just a roll of his eyes and a shake of his head. I wait till the morning to reply. I was so polite and thanked her for bringing it to my attention and that I always encourage him to spend more time with his kids. I should've just blocked her and ignored it maybe. She goes on to tell me how sorry she was to tell me all this because she knows how much he loves me and that maybe he'll start being faithful to me. SHe said she let her emotions get the best of her. I'm like WTF?? She also said I seem like GOOD QUALITY!? What the hell, am I a cow now or something? GRADE A? hahaha. So I asked her when and where this all happened. She said his place and his brothers place. I asked her to describe his place since I was told she was never there only to realize his kids have been there before and they could easily tell her what his place looks like. She describe it fairly well. I'm wondering if it really happened. She messages me on facebook and says ok, he told me to lie and tell you it never happened.. I guess I was just BORED. I'm feeling so confused and maybe hurt. I check out the texts between them two and she's going on about how they had sex and she's sorry she told me but now would be a good time for him to show me how much he loves and needs me. It was as though she made this huge scene and got us fighting, trust me we argued bad over this, and now she's trying to be nice to him. She did a 360! I'm reading this crap thinking what is going on. He's saying back to her that, "You're psycho. You call me to tell me you love me and I tell you I moved on and now you tell my future wife all these lies. stay the f**k out of my relationship." She told him he has no reason to be mad at her. He said, "It's fair to be angry at you. You have no right talking to my future wife and telling her lies to break us up other than to try adn get me back cause you're hurt that I'm happy with the love of my life." Her response, "Oh come on, someone who "wanted you back" would be fighting for you, not encouraging your relationship." She previously said how the kids like me and that I seemed very nice and polite in all the messages. Then SHE says this, "Remember I have a ton of texts and pics and I know you do too. I know you two will get back together, but in the meantime, I'm single and will have sex with you." His response was, "Go f**k yourself and leave me alone." Throughout the whole conversation she never said once they didn't have sex but he was denying it to her.

I don't know what to think. I sorta believe him I sorta believe her because I did have a suspicion in the past. There are some crazy people out there. A few years ago I had a guy flip out on me cause I told his GF that I think he was messing around with someone (stupid me!) So he said me and him messed around when it never happened, I never even met him either, and he told my boyfriend we had sex. So I know people can say things just to screw with you.

She's still calling him today and saying stuff about how she now fears for her life since he's mad at her. Say what?!? Weirdo! He ignored all her calls and texts so she called his work to get a hold of him.

Should I accept that this was all a lie and go forward with our relationship? All of this happened yesterday and the day before.. and today my boyfriend asks me to move in with him.. That kinda took me for a turn. I mean we've talked about many times in the past 3 months but for him to ask it now? Hm.

What do you guys think?