My boyfriend dated this girl for about a month, right before he met me. (End of July 2007). The last day he could have possibly had sex with her was on day 8 of her cycle, and he thinks it was a day or two before that. He also thinks they used a condom, since it was so right after her period, he didn't want any icky stuff on him.

He broke up with her and met me. A month later, she tells him she's pregnant and that's it's some other guy's. Then she changes her mind and says well it COULD be yours.

I'm pretty sure a week after your period starts is not ideal time for most people to get pregnant. And around the time in her cycle where most people would ovulate she was with this other guy and having sex with him. i don't know if condoms were used. this is the guy she first claimed to be the father.

for the next 9 months she totally screwed with my bf's head because she wanted to be with him and he didn't want to be with her. she told him she was sure the baby was his and was trying to weasel her way back into his life. meanwhile i talked to the other guy she was with. he told me she told him she was 95% the baby was his (the other guy) but didn't want to be with him. he said he had a feeling the baby was indeed his.

she then ended up getting together with this guy and they were suddenly so in love. he was taking responsibility for the fatherhood and was going to get a paternity test and let us know the results. meanwhile she is still telling my bf the baby is yours but your not going to have anything to do with it this other guy will raise it.

the average conception date for the due date she was given was more than a week after her and my bf were last together. the baby was born a week after the due date.

this other guy is proudly acting like the father and his whole family has embraced the baby. he decided not to do a paternity test because he felt sure the baby was his and decided he didn't care if the baby wasn't.

i just want to know... how possible is it to be my boyfriends? we just don't want her to show up a few years from now and say surprise u have another kid! especially since we are thinking of having one of our own.

i am not sure what the cycles of this girl were like but she was very very thin prior to getting pregnant. the due date she was given was based on a 28 day cycle and she gave birth a week after that due date.