I have joint locker with following situation.
My Father-in-law(primary holder)
My husband (second holder)
Me(third holder)
Currently, my father-in-law has locker keys & he usually operates locker in our absence. Currently, I am not in good terms with my in-laws. My husband is not courageous enough to ask for key. Most of the stuff in locker is mine. How do I stop my father-in-law to operate locker in my absence as I feel my stuff is in jeopardy?