We tried after just 2 weeks of talking about it. Did just about everything wrong you could do. Our very stable and loving relationship took a hit, this is something she has wanted for a long time and just brought it to my attention. She said it was done, never again, etc. I told her I wanted to try it with her and talked it over. After 6 or 8 weeks of full discussions, what went wrong, how we feel, what we want and expect, what to do, not to do, safe touch, safe words, and so on, we tried again. We have 2 couples we play with regularly, one of them we hang out with as friends now, without playing as well(not everyone's cup of tea, but we enjoy it and the friendship) Everything has gone smooth, and with the help of others here, our communication is excellent (thank you GoldCoCouple for the advice) so when there is a "bump" we bring it up after the experience and adjust our rules and boundaries. Make sure you both know what you are getting into and the first time, at least for us, is not what you expect. Hell, sometimes with our regulars it isn't what we expected, we just make a point to have fun and keep to our rules. Best of luck!
Mr. Dazed