Where’s all the freaky people?

Has anyone ever tried a threesome even if you were married? I’m talking two females and one male. My husband suggested giving it a try. I’m down to try anything one time. Any tips or advice? We already found another female willing to participate..do you think we are doing something wrong?

This is new to all of us. So any tips or stories from past experiences would be appreciated!

Edit: it’s definitely not that I’m not good enough for him. This was actually my idea a few months ago. We’ve talked about it a lot. How far is too far, what am I ok with, what am I not ok with, I trust my husband 100%. Seeing him open up and try new things with me is amazing and I get so excited about it. Plus we’ve both agreed that we could try this one time...if we don’t like it then we never have to do it again...in the end he is still my husband and he still chooses to come home to me everyday.