So here goes. I live on a small (seven houses) cul-de-sac and all of us are friendly with each other. My next door neighbors invite me and the parents over for their parties and we all try to help each other out. Now, I volunteered to recaulk and grout their shower while they were on vacation not expecting or wanting any money in return. And I did tell them this, and would not let them pay me. So, to avoid confrontation again she left an envelope in the mailbox for me with the money inside. For about two weeks I have let it sit there, unopened, thinking about what to do. I know that they would not take it back, but I do feel bad about accepting it. And tonight I finally did open the envelope due to curiosity and to make things even better I feel like they gave me far too much. It probably took me four hours over the course of two nights to perform the job, but that was taking my time and drinking beer. They ended up giving me $150 for the job, and I didn't tell them how long it took me. I just wanted to be neighborly. I am not really sure what I am asking here, maybe just trying to rationalize the situation to myself?