I Want A Threesome

I'm married and me and my husband are very opened minded people. My fantasy is to have a threesome with his brother (he is in the pics with us). He lives with us and on a few ocassions he's accidentally seen my breast and he's even seen me naked once when I forgot to close the bathroom door while showering. I'm sure there has been alot of other occasions as well. Most recently though the 2 of them dared me to take my top off while we were watching a movie together. Feeling flirtatious I said, "I will if you guys will!" . They both took off thier shirts in a heartbeat and then looked at me, waiting. My husband brought out the camera too and started taking pictures of the 'big event'. You can see how embarrassed I was and yet I loved every minute of it. It didn't lead to the threesome though. The problem is that were not sure how ask him if he's willing to do it. - Beth