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

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 …