How old is her son Ryn? Lots of babies go through a making-themself-sick stage around the start of toddlerhood. DD certainly does it, not in distress, more in curiosity, though she does it to see my reaction and to express anger/frustration too. Letting little babies scream themself sick is SO weird - how does that solve anything...don't want to get up to baby so much at night? Listen to them screaming and then get up and change their sheets instead...don't see much workload reduction there.

Bx