DS & DD3 both crash between 8.30 & 9.30. They start out in their own beds. DS comes in most nights, DD comes in first wake up. Anywhere between 11pm & 3am.
They wake up when they wake up.

I started co sleeping with DD2 & have never looked back. My mum doesn't give a rats about the co sleeping. Its the breastfeeding she has a problem with

DD2 is nearly 7 & hasn't slept in my bed in years. Her choice, not mine. They will not be in your bed forever & there's no reason you can't fit 2 in. (Though, it is just me, so its easier)