My ex-hubby wants me to have a threesome with him and his new girlfriend

DEAR DEIDRE: MY ex-husband wants me to have a threesome with him and his new girlfriend and I’m tempted.

I’ve been imagining how to get back at her and now I think my ex has delivered the perfect set up. I’m 29 and my ex is 30. This new woman is 28.

We had only been married a year when he told me he thought he had made a mistake and couldn’t handle the commitment.

I was devastated when he moved out the following week.

He’s never admitted it but I’m sure he was having an affair with this woman well before he left me.

Looking at her social media, there are images of both of them together on work nights out seeming very cosy.

After he left, I went on a ­fitness drive, lost a stone and started partying hard.

I was doing everything I could to forget about him.

But a few months later, when he came over to take our dog for a walk, he started flirting with me. It was a huge ego boost.

I still wanted him back, more than anything to get back at his new girlfriend who would have known we were newlyweds when she tempted him away.

So the next time he came to pick up our dog, I made sure I looked good.

Sure enough he took the bait and started flirting again.

I invited him in for a beer and it didn’t take much persuasion before we were back in our old marital bed having sex.

It was thrilling to get even with her.

I wanted to tell her about us, so she would get a taste of the hurt I felt when she ruined our marriage but then he came up with this surprising suggestion.

At first he was only joking about ­having a threesome with his new partner but it certainly planted the seed of an idea.

Now he’s pestering me non-stop to do it and I imagine he is doing the same with her too.

He wants us to meet to discuss the idea and I’m considering going along with it, only to then reveal that he’s been cheating with me all this time.

DEIDRE SAYS: While all your anger is directed at your ex’s new partner, you are ignoring the fact he was also a party to the infidelity.

It is no doubt easier to blame her than face up to his betrayal.

This distraction won’t help you heal, and sleeping with your ex certainly won’t help you move forward.

This man sounds like a serial cheat – someone in search of validation from others and incapable of building genuine, long-lasting relationships.

You have been let down badly but this man will never help you feel better.

Stop sleeping with him, block him from communicating and get on with your life.

My support pack Moving On will help you.