My thoughts exactly.
But I also see that SM is in good shape, so while not likely to want to do the heavy lifting, I think she could do it (and be resentful about it).
And I can also see her bossing someone around to help her - and would keep up the pressure on that person not to spill the beans. She seems the type that once she makes up her mind, she doesn't change it, doesn't budge, doesn't do anything to make things smoother for others, doesn't apologize, would lie to cover a lie rather than admit a lie.
My opinion only based on what we've seen of her.
jmo