Two negative pg tests and menstrual bleeding

Ok. Here is my question. This is extremely embarrassing for me so please go easy. In November my husband cheated on me. It was a one time encounter with a stripper that turned tricks. The bachelor party that went bad. Anyway apparently this woman got ahold of my husband a week or two after the encounter saying she was preggo. She told him that she needed $80 for a morning after pill. He panicked and gave her the money. She later got ahold of him saying she "took it wrong" and that it didn't work and she needed money for an abortion. She continues to "shake him down" for money up to January 6 when I found out everything. Based on what I had been told by them both, I have her the money for the procedure. The condition was that she had to show me proof of completion. Long story short, she kept coming up with excuses as to why she couldn't keep her appt at the clinic. Then she told me it was "taken care of" because her ex had found out and beat her and she was bleeding (she even sent me pics of bloody toilet paper....way to keep it classy, right?) Anyway, things didn't sound right to me. I spoke with my husband and found out that she had never given him proof that she was preggo. He just panicked and took her at her word. So I made her meet me to take a pregnancy test. When we met she "messed up" the first one. Not realizing that I had purchased a box of 3 she thought she was leaving. Nope. I made her drink a glass of water and sit for 40 minutes until she could pee again. When she took the second test, she peed on the stick and handed it to me. There was noticeable blood (menstrual) in the toilet. I told her that did not look like "spotting" to me. She said that was "the most she bled that day". The test was negative. I asked her how she had thought she was preggo before and she said she had taken a dollar store test before and saw a faint line and had been "so sick" but it had stopped a few weeks prior. That was on January 15. I have her the other test to take first thing the next morning, January 16. Negative again. Since that last test she has not tried to contact me or my husband again.
So here's my question: Do you think that she could potentially be pregnant? I'm working things out with my husband but my biggest fear is that she's going to show up in 6 months with a kid! If that happens I won't stay. Things have (oddly enough) improved between my husband and I since all of this played out. The whole rock bottom thing I guess. I just need collaborative opinions about what could potentially be going on. My friends all say it was a scam and my education (as a nurse) tells me if she was having a miscarriage from being beaten she still would have registered hcg on early result tests. My brain has been so fried by this whole ordeal and I need some solid info. I've even attempted to call her but her number is now disconnected. Answers please!!!