Question

Miss mebbin's loyalty to Mrs packletide is questionable. Discuss.

Answer 1

this is because you miss packletide and miss mebbin were great competitor and wanted to see each other back from them so

Answer 2

Ya it's questionable because her loyalty is only towards money. She was just behaving like her elder sister but actually, she was a calculative mind lady. So, this was her fake loyalty as in the end, she just blackmailed Mrs packletides. Overall, we can say she was only loyal for money.
Hope it helps u dear