Concerned for ex's current situation

Firstly, forgive the long substance but feel it all needs to be laid out to get the right answer. What am I looking for? To see if anyone else comes to the same conclusion as me or someone to tell me I'm being paranoid. My partner of 5yrs [10yrs younger than me] had a brief affair early in the year with a married Asian woman. She was married 3yrs and had been in a relationship with her husband for 10 yrs previous to that. She told my partner that in all that time she had never been able to conceive. Guess what? After 2 romps in the hay with my ex, she fell pregnant. She does not have citizenship, only permanent residency tied to the marriage. At this time she told my partner that she was in the process of separating from her husband. She stayed a few nights at my partner's house telling him that she didn't have anywhere to stay. Yet when he told her at times that she couldn't stay, she went home to her husband. She owns 2 properties – the matrimonial home and a rental. When he told me about it, his first statement was "I'm having a baby but it's not with the woman I love." For the next month we tried to work out the best course of action for him. He was obviously excited about having a baby as he doesn't have any of his own and I am not in a position to have more children. During this month, there were times when she knew we were together and she would bombard him with texts and phone calls. 2 of these occasions ended with her texting that she had had to get her husband to take her to hospital because she was having heart problems [nothing was actually detected]. My partner at this stage said she was an insecure hypochondriac. On another occasion when with me, she texted him that she was bleeding and cramping and asking him what she should do. She is a registered nurse! She also sent a text one day when he came to my place saying that if he could have a date in [my suburb], so could she. She mentioned which way she travelled and it was obvious she had followed him to my place. After being "threatened" by her - "My husband said he will raise this child as his own." my partner finally decided that he felt he must "do the right thing". He allowed her to move into his place "until we sort this out". Within the first week she took a sick day off work and asked to borrow his keys in case she needed to go out and get back in. She then had a set of keys cut for herself. One of the keys is for common property access and is marked "do not copy". My ex was pretty peeved about this. He told me that she started a fight with him one night during the first 2 weeks together telling him that she knew of a guy in his situation who didn't do the right thing by the girl and that the girl ended up taking him for half his assets, house, superannuation etc and child support. He saw this as a threat. So, what's happening with her marriage? As told, she said that her and her husband were in the process of separating but she was going back to stay at the house many times. After moving in with my ex, she tells him that divorce papers have been lodged and would be finalised in May. She tells my ex that her and her husband agreed to lie on affidavits about living separately but apart under the same roof in order for the 1 year separation period to be covered. That tells my ex that she has an arrangement with her husband [currently out of work] that he can in the home and she pays all the bills - mortgage, utilities, rates etc. This is continuing. My ex advises that her divorce has gone through. During all this time, my ex and I continue to talk. We really are best friends and we have always solved problems together. I have become his sounding board but I feel that everything is tainted by his rose coloured baby glasses. Up next, to test her integrity, my ex suggests they look at buying a place together. She agrees, adding that my ex may have to assume some of her debt. She arranges for her broker [of same nationality] to come and the broker, after looking at all the figures, advises that after they sell all 3 properties, pay out her ex husband and my ex’s mortgage and borrow 100% LVR + stamp duty and costs, they would be looking at approximately $1m finance. None of the properties are mansions – just average places in not so affluent suburbs. My ex says he will think about it. 3 days later he rings the broker to tell him he is not prepared to go ahead. He also advises the woman that he has done this. The next day my ex receives a call from the broker saying that the woman had rung him and said that my ex was still thinking about it and to continue processing the paperwork. Her next suggestion is they buy a place together from scratch. e.g. she keeps her properties as she wants to maintain a real estate portfolio. That she will get her ex husband to sign a binding financial agreement with respect to the properties until property settlement in 1 yrs time. In the meantime, she will continue to allow him to live there, rent free. The agreement has not yet been drawn or signed. My ex tells me that out of the blue the other night she said to him "If anything ever happens to our relationship there will be a shit fight and you will end up with nothing - not even your own property!" A few weekends ago, she went interstate to the wedding of her ex sister-in-law. My ex was not comfortable with this but she insists that her and her husband are still amicable. Mind you, he is not supposed to have any contact with me or my family as, according to her, he should move on completely to a life with her. I told my ex that I thought it strange to be turning up to the ex husband’s family wedding, obviously pregnant, with everyone at the wedding knowing that she was pregnant to someone else and that it was the cause of her marriage breakdown. My ex then tells me that this won’t be a problem as her husband’s family know nothing about the separation, divorce or pregnancy. I could go on and on but there just isn’t enough room here. I guess my questions are: “Does any of this seem normal to you? Do the actions of this woman seem above board and legitimate?”

she took advantage of your ex and he was foolish,he need not stay with her and can still help raise the child without getting manipulated by her