Please please please helpppp

Okay, so just over a month ago I was dating a guy for about six weeks, but we’ve been split up for around a month now and since then I’ve met someone new. My parents knew and loved me ex, but this new guy I’m sort of seeing has already told his mum about me and they’ve invited me for a meal and he really wants me to tell my mum about him but because I feel like its too soon since my ex and I split up, I don’t feel comfortable doing so. What do I do?