Denton that's awful!
I don't think you should message his wife!
It's annoying and disgusting behaviour (as louby said) but I think a few men are like this, a few years ago I met a man in a bar, he told me he was separated (no ring), we dated etc... turned out he was more than probably still with wife, gave me a load of flannel that it was too expensive to get divorced etc then said he'd got back with her on V Day after we'd dated a while and broke up, I think he was having an affair as he never let me see the car (number plate?), paid in cash for everything, including a weekend away at hotel said it was for VAT/tax reasons he used cash... and most likely had a spare mobile phone. He actually turned up on my doorstep last winter, I wasn't in but neighbour of upstairs flat saw him and rang me.... as he'd rung their bell too! He'd done that in the summer too called unannounced, when my brother was staying and I was out....