Unclear why you post on CX thread since you go from Bali to Thailand on Air Asia.

If you can get to Thailand, I strongly doubt that Thai immigration will refuse entry to a family where a daughter misses the 6-month rule by a few days.
They are very eager to get tourists and are mostly worried about people who could create trouble, like overstaying their visa.. I never experienced or heard of anyone refused entry for that reason. Just make sure you have an onward flight ticket.

However, airlines are risk averse. When you fill the passport information with expiry date, they might deny you.
I have no experience with Asia X. But print the Timatic page which says that you are OK.