Hi, for me, personally, I will throw it away as breastmilk is supposed to be kept in fridge to remain its "freshness". If it is left outside for a week, I wouldnt risk it to bathe the kids. I know it is painful to throw away but it is better than them having (might) rashes and need to seek medical attention.
I will definitely throw away the milk. Thawed milk should be "consumed" within 24hours. Just in case when you're giving your LO a milk bath and they accidentally "consumed" some milk. I know it's very heartpain to throw away your milk but better be safe.