I was in the big blind with Ad 7d . Four people called and I checked. There was $5 in the pot. The flop came 10d 10c 8d . The first guy bet $2, and everyone called. I had the nut flush draw and was getting 6.5 to 1 on my money. So I called because I was getting good odds on my draw. I called, making the pot $15. The turn brought the 9d. First guy checked, as did the second. Third bet 5, 4th called, I reraised all in to $20, and the first position person reraised! 3rd position called all-in. 1st guy showed 10-9 for a full boat and 3rd position guy showed 9-9 for a smaller boat. Needless to say, I lost. I am not writing this because it was a bad beat, I just want to know if I played my flush wrong. I thought the nut flush would be good, only to find 2 people had full houses. What should I have done?

When the board is paired your nut flush is not the nuts, it's simply the highest flush. Four tens is the nuts. It's risky to go all-in when you don't have the nuts, especially agianst more than one opponent. If you were feeling good about your flush, then a raise of 5 rather than 20 might have saved you some money. Or a flat call would have been good too. After a reraise from first position, you most likely could fold.

Hey this armchair poker is fun.

I agree.....when the board pairs and I have my flush, alarm bells go off and I go in to check/call mode. I am not necessarily laying it down, but I am not pushing all in on a paired board. I might lay it down to an unreasonable bet, but in general I am letting someone else drive and calling most resonable bets.