Jacob certainly prefers to be on the warmer side and doesn't sleep well if it's too cool.

If Luxxe slept better when it was warmer, perhaps you could try putting some more clothing on her, or another blanket or something like that. She may like to be nice and snuggly warm (they're used to being somewhere very warm indeed - Mummy's tummy!)

Ambah is right - she wouldn't be able to regulate her own body temperature at this stage.