I had sex with my girlfriend’s mum – now we’ve got to go for Sunday lunch

DEAR DEIDRE: I STUPIDLY had sex with my girlfriend’s mum. I always had an opinion about men who cheated - they were scum - and now I’ve done it myself.

My girlfriend and I have been together for 18 months. She’s 28 and I’m 30.

She works in PR and I’m a gym instructor. My girlfriend had to go to a big event in Spain in November that she’d been planning for months. It meant we couldn’t be together but the job was important to her.

My girlfriend’s mother stayed with us the weekend before my girlfriend was leaving. I planned to drop her off on the way back from dropping my girlfriend at the airport.

When we got back to her house though, she invited me in.

Her mother is a fit 48-year-old divorcee. After a cup of tea, she got some wine from the fridge and before I knew it, we had finished the bottle.

She insisted we went next door because she’d been invited for drinks so I went along and by the time I got back, I was wrecked. 

She said she was cold so she asked me for a cuddle.

I then went up to bed but she must have misread our hug and in the middle of the night she climbed into bed beside me. She was wearing sexy lingerie. We kissed and then we had sex.

I’m not proud of what I did but it was an alcohol-infused haze. I’d left there before she came down the next morning.

I feel so guilty but I can’t get her mother out of my mind. We are due there for Sunday lunch but I’m scared that this will blow up on me. I feel so bad and deserve all I get.

DEIDRE SAYS: What a depressing scenario; your girlfriend would be absolutely devastated if she were to learn about this.

Talk to your girlfriend’s mum and explain that this will never happen again.

Ensure you are never alone with your girlfriend’s mum again. She won’t say anything if you don’t — she has her relationship with her daughter to lose.

Learn from this mistake and make a pact to put fresh energy into your relationship with your girlfriend.

Alcohol seriously damages our ability to make judgements so, avoid over indulging to stay in control of your choices.

My support pack called Relationship MOT will help.