It took them forever to fall sleep and I did find myself on more than one occasion yelling up the stairs, asking them to be quiet and go to sleep. I contemplated, more than once, sending Abby back to her own bedroom.
And then I thought about it for a moment. So what if they were chattering away to each other long past their bedtime? Nobody had to get up early the next morning. Then I remembered reading some bit of parenting advice, somewhere long since forgotten, that letting your kids do relationship bonding type stuff far outweighs any inconvenience to you. Or something along those lines.
Seems like pretty good advice.