(2) Any individual who holds an individual license may allow his or her immediate family members to operate his or her GMRS station or stations. Immediate family members are the licensee's spouse, children, grandchildren, stepchildren, parents, grandparents, stepparents, brothers, sisters, aunts, uncles, nieces, nephews, and in-laws.
https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-95
Seem pretty clear to me..... their definition of family
Not being in the "FAMILY," I don't think I can delegate any behavior to the individual licensee on how to conduct their responsibilities in this matter.
Just my two cents worth