I think 10pm is plenty late enough and as selfish as it sounds, I do like to have a hour or so "chill out, no kids" time before I go to bed.
The 1 & 2yr old are in bed between 7-8pm.
I'm up at 7am in the mornings with the kids, spend all day doing fun things with them, including Dss when he's not on the Xbox and feel I deserve a couple hours in the evening to myself!
Dp has just made me feel really mean for telling Dss that it's bedtime because "it's a holiday"
AIBU
So as not to drip feed, at his mums, Dss goes to bed at 8.30/9pm on a school night & 9/9.30pm on a weekend so he's still getting a later night here.