Apple ID with new phone

If they were purchased using her account then that's what you will need to re-download them. Better would be to purchase your own copies unless you can use Family Sharing.

Family Sharing - https://support.apple.com/HT201060 - "Family Sharing makes it easy for up to six people [different Apple IDs] in your family to share each other’s iTunes, iBooks, and App Store purchases without sharing accounts. Pay for family purchases with the same credit card and approve kids’ spending right from a parent’s device. And share photos, a family calendar, and more to help keep everyone connected."

Set up Family Sharing - https://support.apple.com/HT201088

Sharing purchased content with Family Sharing - http://support.apple.com/HT201085

If you don't see your family's shared content - http://support.apple.com/HT201454

Then there's something still in there that's trying to get to Apple using her ID. Do you mean you just bought the apps with your ID and it is saying you have to enter hers before you can download them?????

What to do after [or before] you change your Apple ID email address or password - https://support.apple.com/HT204071 - After you change your Apple ID email address or password, you might need to update your sign-in information with any Apple services you're using.