Long story short, I needed a handy man to help me with some projects around my house, my niece who lives with?

her bf and his Father and is 5 months preggers. The Father recently was laid off for one day a week, handy and needing to make up that lost income. He started working on that day off for me, doing little things around the house. I found him to be very sweet, kind and clever. On my birthday, he took me out for an ice cream and we talked until 2:30 am. His wife left him 5 years ago to live in gov housing and has since been arrested for stealing like 3x. She just got out of jail yesterday and all kinds of drama has broke out, since we have started spending time together, nothing has happened other than some handholding, and a few friendly kisses. He asked for a divorce in November 2008 and they had agreed to wait till Oct. 2009 to file. So what is the problem? Should I get any more involved? Send him packing? The niece and bf have been here many times in the past and even recently, eating, playing in the pool and having me drive them here and there (pre-natal visits, shopping, etc) The bf even dropped off a collection of buttonless pants to be mended. All the sudden, since Mom is now out of jail, they are acting as if I stole her man and she is the wounded party, even though its not true. Since I have done nothing so far, other than a little kissing and hugging, should I walk away? The wife called 5x this morning, sent a nasty comment through myspace to me and even had her 22 yo son (ny niece's bf) write a gut wrenching letter, saying how sick we made him (he didn't think so when he had me drive him and pregger girl to the hospital for the finding out the baby's sex on Monday). What should I do?