My DS (18 mths) and my DD (3 mths) are now that she's sleeping through the night, sharing a room.
AT first she was going to bed 20-60 mins after he'd settled and even though she squawked a little going down, it didn't seem to bother or wake him at all.
tonight they went to bed at the same time - due to tiredness, timing of feeds etc.
She was cranky and grizzled for 5 mins and went quiet. Then he piped up and mimicked her. She woke and so it went on, back and forth for 20 mins, then silence.
Should I aim to stagger their bed times to avoid this? Its just that last night he sort of waited for her to arrive before settlign properly. This is all new and I'm finding my way forward with what works best for them, but any others in this situation / who have been in it who can offer their advice / experience, I'd be grateful.