Hi there ghosty29,
I understand that you have a question about purchases under your Apple ID which is part of a Family Sharing group. Here is some more information about ways to make purchases under Family Sharing:
After you set up your family, any time a family member initiates a new purchase it will be billed directly to your account, unless that family member has gift or store credit. First, their store credit will be used to pay the partial or total bill. The remainder will bill to the family organizer's card. As the family organizer, any receipts generated by the transaction will be sent to you. Learn more about how iTunes Store purchases are billed.
Once paid for, a purchased item is added to the account of the family member who initiated the purchase. In other words, the content belongs to them, much as it would if you were buying them a book or a DVD. If Family Sharing is ever disabled, each member will keep the purchases they initiated, even though they were paid for by the family organizer.
When someone upgrades their iCloud Storage plan, the upgrade will be billed to the Apple ID that they use with iCloud. If they're in a family group and they use the same Apple ID in iCloud and iTunes, the upgrade will be billed to the family organizer.
Family purchases and payments - Apple Support
https://support.apple.com/en-us/HT201079
Take care, and thanks for visiting the Apple Support Communities.
