I know where you are coming form on this. Although my sitch is a little different, I have asked these same question. I have not yet come up with an easier answer.
However, I will say as an outsider looking in that your first priority has to be your kids. You are in a situation where you have 2 young girls being exposed to some strange man (or a series of them if I read correctly) that you don't know or know anything about. What you do know is that these men have no problem pursuring a married woman. It is important to look after the emotional strain on your kids, but in this case do not forget their physical security.
M35 W37 S9 D6 M12 yrs Know 15 yrs Bomb 1/28/07 My Sitch Failure is the opportunity to start again more intelligently - Henry Ford