Adyson and their scout troop (including Isabella) want to keep Mr.S as a new member of the Fireside Girls, even through this is a Girls scouts troop and no an boys scouts troop. Mr.S is such a nice and friendly guy that the Fireside Girls (except Isabella, she's doesn't agree with that situation) want to keep him as a new member of the troop.
In my mind, if they do the cute eyes towards Isabella to keep him in in the Fireside Girls troop, I'm 100% sure that Isabella could accept their request.