Seeking Advice For A B'day Present For My Hubby

I ma looking for some advice, especially from women.

My name is Marsha, I'm 45, married to Ed who is turning 50 next month.

I'm thinking of giving him a birthday present I'm quite sure he would love. It involves him, me, and my best friend Debbie.

A few years ago Debbie and i became lovers by accident. We were going to concerts together, sometimes one night and sometimes 2 or 3 depending how close to home. One night after the concert we were wide awake when we got back to the hotel. I took a shower and got in my bed, then Debbie showered. We started talking about the concert and many of the hot guys we saw there. Debbie asked me how often Ed & I have sex. I said it depends, but at least 2x. She confessed that she hasn't been fucked for almost 2 months. She broke up with the guy she was seeing. I was consoling her and before I knew it she kissed me. I jumped back and she apologized. I said no apology needed and kissed her. We had incredible sex that night. We both said we didn't know each other were into women. I told I've never been with a woman. After that we fucked often while home and every night when we went away. I never told Ed.

Here's the advice I need.

I talked to Debbie and asked her if she would be interested and willing to have sex with Ed for his birthday. It would be the three of us. I know Ed would be ecstatic. While discussing it with her many questions came up. 1) would i be jealous 2) would it be one and done 3) how would we set it up

I'm sure there are more. Right now I can say I won't be jealous, but considering it's never happened I can't be sure.

If you've been in this situation your advice would be greatly appreciated.

Thank you in advance
Marsha