I trump a lot of you in terms of an eyebrow raising age gap! I'm 32 and my dp is 57! Divorced, 3 grown up children, one of whom will be adult about the baby though not thrilled, the other 2 will have a worse reaction than can possibly be imagined!
Sadly my dp's mother died in Dec so she isn't here. She was a great supporter of ours, knew we were trying for a baby and was v excited. It means so much to both of us to know that.
My family are entirely supportive and thrilled. My mum doesn't care who I'm with as long as I'm happy and they treat me well.
Can I also say that I don't think being in your 20's makes you a young mum (in the perceived negative sense). Don't forget this is very recent thinking. My mum was considered quite old when she had me. She was 27! God knows what they thought of her sister who was 33! Sod anyone who judges.