I'm reading precious little sleep and I've been trying to get a routine with him when it comes to his sleep. Some days are followed, some days (like the holidays) are adjusted. When he is 4 months old I'll hopefully be successful at sleep training him. For feeding, he's clockwork with every 3-4 hours. Except night time as he started sleeping through the night right after he turned 3 months.
i know generally what a schedule looks like but i follow her cues
Schedule!
Follow a schedule but willing to be flexible. The schedule shouldn’t be rigid. Is there a difference in how you and your SIL feed your babies? For example if she’s EBF and you’re bottle feeding (breastmilk or formula) then EBF is more “flowy”