Is it normal for a crossdresser to play the 'wife'?

I am a fairly young crossdresser. I went to a married man's house when his wife had gone out with their kids. I stripped down to my birthday suit. Then I put on his wife's lingerie, shoes, perfume, lipstick and her favourite evening dress. I explored her makeup kit and used all I could even though the kit itself was very limited. When I appeared out of the bedroom my partner said I was thin and toned, something he wished his wife was too.

Poor guy was so sexually frustrated with his wife, he had three orgasms in a matter of just a couple of hours. We followed it up with some cuddling, kissing and finally went to sleep. It was clear that he had not felt this good about himself in years. I made him feel like a man and he made me feel like a woman. It was priceless.

I've been asked to come over to his place whenever his wife is out and play out these crossdressing wife fantasies. I find it extremely sensual but I'm afraid I might be a potential home wrecker.

Is it normal to fantasize about being the wife in such a situation?