What Else Can I DO???

Taryn is pregnant. With her horrible ex's baby. He dumped her like a year ago, and all this time they've been on-again, off-again, her hoping he would take her back for real this time. So many times he came crawling back to her with promises of going to therapy, and promises of change, but he just keeps screwing her over, and she just keeps taking him back! It's sooooo frustrating. He's turned her into one of those desperate, pathetic girls who goes through his phone constantly, and contacts all the girls he dates on facebook, telling them to stay away. She is THAT GIRL. And now she's pregnant, and part of me can't help but wonder, "Did she do this on purpose?" Because when it comes to him, I'm just not sure what she's capable of anymore! She's only 6 weeks, but I think she thinks she's going to get her happy ending with him and this baby. She says that he's "on board with it" and he even went to the doctor with her. Well that's what a supportive father-to-be is supposed to do!! He doesn't deserve a medal for that, I mean COME ON!!! And he's still talking to other girls, and she knows it. She just chooses to turn a blind eye! It's only a matter of time now before she catches him in a lie, or catches him talking to some other girl, or goes through his phone and finds something she's not gonna like.
Why do some girls do this to themselves?? I really don't understand!
Let me just paint you a picture of Taryn, ok? She has the perfect body. She works out constantly. She's about 5'6", looooooong beautiful, thick brown hair, one of those really dazzling smiles. She's one of those girls that really is actually sweet. She's compassionate, and considerate and kind. She's fun, and outgoing, but never overbearing. She does love kids, I'll give her that. She has 3 nieces that she just adores. I'd like to say that she's smart, but I'm not so sure... For one thing, she never finished college. That is the one good thing I can say about Dahmer (her ex): that he encouraged her to go back to school. Although, encouraged isn't exactly the right word. More like shamed her into it by making her think she wasn't good enough for him. Ugh. But not finishing school isn't really the issue. It's that she doesn't have any real marketable skills. All she's done her entire adult life is bartend. And there's nothing wrong with that either, hell, I've done it too! The problem is that she doesn't seem to have any goals or aspirations, other than to get married! It's pretty plain to see that she's just been waiting for some guy to come along and sweep her off her feet and take care of her. And now that she's pregnant, she can't exactly continue bartending at 7-8 months, so I'm assuming she expects him to take care of her. And that really worries me, because he's proven time and time again that he's unreliable, untrustworthy, selfish and immature. She does have a lot of family in Houston with her, so at least if he bails she won't be totally on her own, but still... Why can't she see how bad he is for her?? How her life completely revolves around him and all her common sense goes right out the window!
From my own selfish standpoint, this isn't good because I've have outwardly hated on Dahmer since they broke up, including throwing a beer in his face. All because of Taryn!! She told me bad things about him, told me she was done with him for good, that she hated him! And I hated him right along with her. Stupid me. I should have known better. Now if they do end up together, I can never show my face around the 2 of them. ((Sigh))
Well, it's still early. Even though she's talking about keeping the baby and living happily ever after as if that's actually an achievable goal, anything could happen. I just want Taryn to have a great guy, who loves her unconditionally and and appreciates her and makes her happy. Not a selfish asshole who runs around on her and makes her crazy! And now I worry that she'll never get those things. Not as long as Dahmer is in the picture. I've told her this, believe me. And I told her I'd support her whatever she decides to do. Because what else can I do?? I mean seriously, tell me! What else can I do??