DEAR DEIDRE: I HAD a one-night stand with my daughter-in-law and am so deeply in love with her that I have left my wife – but will we ever be together?

I am 46 and my wife is 45. Our daughter is 19 and our son is 26.

3 I had a steamy one-night stand with my daughter-in-law and have left my wife Credit: Alamy

The first time he brought this girl home, I was bowled over. She is 23 and stunningly beautiful. We welcomed her into our family.

They got married last year and it was a great day.

She and my son live with us, and my wife got her a job at the supermarket where she works.

We all went to my nephew’s wedding a few months ago and stayed in a hotel from the Friday night.

3 We were all over one another and ended up having sex on the back seat of my car Credit: Alamy

My daughter-in-law and I stayed drinking in the bar on the first night after my wife and son went to bed.

We went outside for a smoke but sat in my car as it was chilly. I don’t know why but I leaned over to give her a kiss on the cheek and she kissed my lips.

That was it. We were all over one another and ended up having sex on the back seat.

We agreed it would not happen again and would stay our secret. She loves my son and we didn’t want to hurt anyone.

A couple of months later, we had a family Sunday lunch round ours and my son said he had something to tell us.

3 My daughter-in-law has admitted the baby could be mine Credit: Alamy

With a huge grin on his face, he said his wife was pregnant and they were over the moon. I congratulated them but felt numb inside.

I talked to her the next day about her dates and she admits there is a chance the baby could be mine.

I said I wanted to be with her and would leave my wife. She doesn’t know what she wants.

The next day I told my wife we were over, packed my bags and left home.

This whole thing is such a mess and I have no idea what to do.

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DEIDRE SAYS: Your son and your daughter-in-law are happy about the baby, she sounds as if she wants to stay in her marriage and there is every chance your son is the father –assuming they have a regular sex life.

Falling for your daughter-in-law may feel like a bolt from the blue for you but think carefully before you throw away your marriage and the future happiness of your family – including the happiness of this baby.

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Maybe the fling has made you feel young again but the reality is starting over with your daughter-in-law would be unlikely to work out.

It would be better for you to give them some space and take stock of what is going on in your marriage and your life right now.

Tell your wife you realise you have hurt her deeply by walking out like that but you want to try again with your relationship. My e-leaflet Your Relationship MoT can help.

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