Dear John,

I have been with my husband for 15 years and we were very happy (or so I thought). Then I found out that he'd been having an affair for four years. He said it was just some fun and it was me and the kids he truly loved. I asked him to stop and he said he would, but in May of this year he announced he was going away for a week on holiday. When I asked him who with, he said that he was going on his own – and I immediately knew that he was going with her.

I put him out of the marital home, but now he keeps asking to come back. He says how much he loves me - more than when we first met – and, yes, I do love him too. However, I don't think I can ever trust him again as I will never be able to know if he is telling me the truth.

Everyone I speak to about it says the same thing - "It's up to you" – but I would dearly love an opinion from someone who doesn't know me.

Dear John writes:

It's up to you. Nah, I'm just kidding. In fact, I have some damned good advice - even if I do say so myself...

Based on the information you've provided, it seems that you've handled this situation – a horrible situation, and one that truly does not appear to be of your own making – in an exemplary fashion.

For better or worse, you were mature enough to give your husband a second chance. And, after he blew it, you stuck to your guns and told him to sling his philandering hook. Bravo. Weaker people would have clung onto him for as long as possible if they were in your situation, letting him trample all over your feelings while he fecked off to Majorca with the local equivalent of Avaline from Bread. But not you! You should be quietly proud of your resolve.

In my opinion, what you need to do now is carry on being bloody-minded, and should waste no time in telling your husband where he can stick it. Start divorce proceedings immediately, and get him out of your life as quickly as you can. Some intense but relatively short-term woe will be a far easier thing to deal with than a lifetime of checking collars for lipstick and fretting that you're being played for a numpty.

Oh, and there are an awful lot of men out there who don't cheat, you know. In a few months time, you might well be ready to go and find one. After all, there's no reason why he should be having all the fun.

Next question: Should I keep the baby?