AIBU to not want to babysit 10yr and 12 yr old girls?

[nannynick]

Is it unreasonable for me to refuse to babysit for a family who has 10yr and 12yr old girls?

I specialise in caring for babies and toddlers, though I do care for some older children.

In the past I have taken on families with just older children but I have decided recently to stop doing that... mainly due to it being a lot harder work quite frankly.

If the children were boys, I wouldn't take them on either.

AIBU?

We only ever had male sitters when I was that age.

It worked very well. Sitter would put the football on, I would disappear up to my room bored to death.

My parents were strict about ground rules and expectations and we didn't dare mess the babysitter about because we knew we'd get in huge trouble.