So the tiny baby that arrived in the world 13 years ago last week has today bagged himself a rather lovely girlfriend.
She is smart, funny, bright and creative. He is shy, awkward in company, finds it very hard to make friends with anything other than animals, is happy to live in a pigsty bedroom and, until recently, horded a toenail collection at the side of his bed.
I am gobsmacked. I've always kind of assumed that he'd be the one who "lived with his mother" till he was 50.
Anyone else suddenly realising that their baby is hurtling towards adulthood?