You can call me NIK
Offer to watch her daughter. She likely has a million things to do that would be easier without a little one underfoot. She may also need a break so she can just rest. You could "borrow" her daughter for lunch or something, giving her a little time to herself.
Bring over some holiday treats - cookies, etc. She might not be up to doing the decorating, baking, etc.. You could also offer to help out with any shopping or errands - make it casual by giving her a call and mentioning you're heading to the store and can pick up anything she might need?
This is it. The darkest day. The blackest hour. Chin up, shoulders back. Let's see what we're made of, you and I.
― The Doctor