1. We are NOT married.
2. He didn't sleep with her whilst I was pregnant.
3. She's recently moved in with her mother who lives a few doors down.
4. They have NOT been in contact since that night
5. She herself agrees and admits that it was that ONE night. There was nothing else.
SO and I went to the police. SO wanted to. We've reported what has been happening and the police are taking it very seriously given my condition and the fact she is now closer. They have taken a detailed statement from SO about that night and any contact leading up to this. They are checking through call records, cell phone bills including messages, emails and Facebook. They were at her Mother's house a while ago so I'm guessing they've gone to speak to her.
The police came round today to talk to us about what had happened. They took a statement from her however they've said they're confused. Apparently in her statemet she confirmed that they slept together on the night in question (September15th 2011). She said that after my SO had said that it was a mistake and he had a fiancé and 2 children who he had no plans to leave and couldn't believe he'd just betrayed us. She says in her statement that they never exchange numbers and she didn't see him again. She said that a couple of months ago she'd seen us buying baby clothes, noticed my small bump and how cosy we were and figured things out. She says she found my number in a friends phone and that's how she got my number. She said when she went to visit her Mum in August, she saw us out in our front garden playing with the kids and found out we lived there. She never proceeded to tell the police that my SO had not spoken to her or seen her at all since that night, but then claimed she's pregnant with his baby. The police are somewhat confused by this claim. They have requested she goes to the hospital and has a pregnancy test. Apparently her mother also informed the police that she has had mental problems in the past.