Okay now...
You are Jupiter retro, peregrine in Taurus and in the 5th house, the house of your baby, which is Mars. As I said previously, you are in your baby's detriment, so be careful about stressful conditions that might harm the baby. The way you are now, you don't know if you're coming or going, not thinking straight, this is why I would advise you not to make any big decisions about this until Jupiter turns direct.
Your baby is Mars in Virgo, ruled by Mercury - no doubt he is the father of your baby.
He is Mercury in Sag, in his own detriment (of ill character or health - perhaps a liar as you said). He is under your rulership and in your house, meaning he is choosing you.
She is Venus also in Sag. Mercury has applied to conjunct Venus, but they never actually perfected the conjunction, just intended to, because Mercury is going to turn retro. (are you sure they slept together, did your bf confirm it?)
Her baby (yes, she is pregnant, from the chart - Moon is in her house, her baby is in her house, but they are ALL in Via combusta, a very misfortunate place to be) is Saturn, exalted in Libra. Saturn and Mercury are in mutual reception by term, which could be something... it could be his child. Mercury is applying to Saturn but will also never perfect because he is going retro. This leaves room for doubt whether the child is his or not.
Moon is in Scorpio in fall suggesting bad behavior from women with ill intentions. It is in your man's 5th house and your house of hopes... This woman is wrecking havoc in this house. Right now Fortune is with her (oddly, Fortune was conjunct the other woman in my chart as well and she was also in detriment in Scorpio - a very bad placement for women, sugesting an unscrupulous character, malice and vengeance). She may feel like a winner for a while, but she's got nothing on you, except the influence you give her (you are ruled by Venus and in Moon's exaltation), but she's also ruled by you - odd MR. In my case, me being Jupiter in Taurus ruled by her, I thought she had the upper hand on me, she had a baby, I had nothing. And I lost in the end, but as I said, your chart looks much better than mine.
I can't really say from this chart if it's his baby or not... my chart was also controversial and astrologers could not agree if it was his baby or not. But they did paternity tests so that is settled now...
Your man turning away from her child might mean he will refuse to recognize the baby, though the baby is on his mind quite a bit. But her baby is nothing compared to the influence you have on him, so I wouldn't worry about him going to her. He's also turning his back on her by going retro.
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Whatever you give to a woman, she will make it GREATER. Give her SPERM, she will give you a BABY. Give her a HOUSE, she will give you a HOME. Give her GROCERIES, she will give you a MEAL. Give her LOVE, and she will give you her HEART! She multiplies and enlarges what she is given. So, if you give her CR@P, be prepared to receive a ton of SH!T!