Hmm., OK. How to go about telling your mum. You could just introduce him without mentioning his age, or you could say "just want to warn you mum, he's a little bit older than me." That's what I did. When they see your man is a young 22 year old they'll be fine! Remember, mine was 51. 22 is nothing. You have nothing to worry about. Do report back, though. We like to have happy endings, here.