HELP Please!

Okay - so W is scheduled to move out in less than 3 weeks. She does not know this but on my own I have been doing a little househunting myself, just to see what is out there. I haven't had too much luck since there are not a lot of properties available in my price range and the ones that are get snapped up pretty quick. However I looked at one today that might work. It is in my price range and still in my kids school district. It's not my dream house but it would work. If I jumped on it and got it, then my W would not need to move into the apartment she is set to lease in just about 3 weeks. Instead she could stay here and we could work out an arrangement where she get the kids one week and I get them another.

So what is the delimna for me. Well because this situation actually helps her out more than it helps me. First, it means that she would not be the one leaving, I would be. This also means she wouldn't have to come up with some fantasy reason as to why she moved out, since I haven't really given her any of the usual reasons a wife leaves a husband, i.e. cheating, physical/emotional abuse, drugs/drinking. I have no idea what her story is going to be to people, but what she has floated around so far is that she is not able to be her "true" person with me, which when I have pressed her to explain exactly what that means she can't explain it (in otherwords it's just an excuse).

So the other option is I can just be content and stay put, let her have to move out and do all the explaining as to why she left the marriage and also end up having a bit less time with the girls (her apartment is outside the school district so it would mean she would only have them every other weekend and then a couple of evenings during the week.

Part of me wants to be the nice guy and buy the house, making things easier for everyone (but me). The other part is a bit more vindictive and wants to see her have to suffer a few consequences. Is that being to selfish on my part. Hoping for some unbiased input here. Thanks.

S4H