I think the trouble is, what we see of River is River on her very best behavior because the Doctor is there. She’s a goodie when the Doctor is around and hasn’t owned up to all the other people she’s married to.
But if you watch the show, she’s always referring to all sorts of other relationships — and the Doctor, he’s not really registering, he doesn’t get that he’s one of many on the shelf. I just can’t imagine her being responsible enough; she’s just so naughty.
Jay sighed. Romana had asked him to go out and get her ice cream in the middle of what was basically a monsoon. Normally, he wouldn’t care, but he was uncertain. The rain made it hard to drive. The roads were slippery and it was hard to see.
That was when the motorcycle he was riding slipped and skidded on the road, Jay landing on his arm. Fortunately, there was a witness who called an ambulance. After being checked in, the hospital called home. “Hello? Is Mrs Pond there? Your husband was in a motorcycle accident.”