Major huge question!

I got home today and there was a blank envelope in the mailbox with $700 check from H. I am really glad to get the check because I need the money, however we have not had any contact in almost two weeks. I tried to call him and text him to understand why it was so much. Like i have put before I am only looking for $500 a month. I don't know if he is giving more because I paid for all the Christmas presents, if it is because he hasn't given me anything for most of the time he has moved out and he is back paying, I don't know if there are strings attached, for example, I paid you now I get S whenever I want, or if this is some strategy to help him in a D. I just don't know and H won't talk to me about it. I called and called and called, and finally just left a message saying that he needs to call me back so we can talk about the logistics of what is going to be happening from here on out (a little of what you are doing Clinging).

So here is my question, should I keep any of the money or not (honestly I would only keep what I have asked for unless he told me why for the rest)? Considering I don't know anything at all about what is going on, his plans, nothing, or should I just give him the check back. I would give the check back because until I know what his motivation is, I don't want to get caught in a trap. Thoughts?


Me29 S3
H left 4/1/09
I file 8/2/10
Divorce final 5/17/11
1st http://www.tinyurl.com/25lhu52
2nd http://www.tinyurl.com/2c35ueg
3rd http://www.tinyurl.com/322yk89