Family Sharing & Subscription Payments

Hi,

I am the family organiser for my family on our devices. My daughter is also in the family with her new iPhone we recently got her. I am loving that I can use the Find My App to find her sometimes because she is a bit of a wanderer!

Can I add my mother to my family so that she can use Find My to find my daughter on the app when necessary? My mother has some subscriptions but she does not want to share these (which is fine) and I do not want to have to pay for them - will these be affected?

Thanks.