My girlfriend wants her female lover to move in with us.

She thinks that all three of us can live, and love, in harmony – sharing one bed and all the bills. She’s making me feel difficult for hesitating.

I didn’t even know she had a secret girlfriend until recently. I came home and found them snogging on the sofa.

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You can check out more relationship and sex advice from Daily Star agony aunt Jane O'Gorman here.

They invited me to join them, but I muttered: “No thanks.” Now my girl is turning up the heat. She says she’s sick of pretending. Apparently, I should be willing to accept the other most important person in her life.

I don’t want anyone else living in my home. I’m not interested in sharing anything from the gas bill to our sex toys.

Does that make me a dinosaur? I thought I knew my girl, but now it feels as if our relationship has been a sham.

He's not sure about sharing a bed with the two women

JANE SAYS: You shouldn’t feel obliged to share your home with anyone. You’ve got to be strong and stand your ground.

Talk to your girlfriend about your feelings and how you believe she’s moving the goalposts. Does she accept you have a say? Was it ever the plan to move in a third party?

Having sex with another woman is still cheating. I’m also concerned about your sexual health. Do they ever have sex with others too?

Don’t ever feel guilty for speaking your mind. Be prepared that she may choose her over you.