I don't have as much against Summer as some people here - which is cool - differing opinions are fine. To me I just see a young girl who tried to spread her wings in New York and just realized she wasn't cut out for it. I know a lot of people who had the same experience with NYC. I'm guessing she didn't want to move back home, and A&P had been pushing her hard to move in with them. She was offered not just free rent but the chance to make some money in a very comfortable home job environment. At 21, I'd have taken that deal. She's gonna make it through college with way less debt just on the rent saving alone. Plus she's studying to be an ABA therapist eventually, right? Just in the undergrad portion now. But saying she has live in experience with an autistic teenager will probably look impressive to grad school teachers/etc. Basically - I think on paper this had nothing but positives for Summer.
As far as A&P's motives - that's where I get aggravated. It doesn't at all seem coincidence to me that they wanted Summer in before Isaiah left. I think she's the replacement older sibling. Someone that, when the world isn't so weird and normal life resumes, they can dump Abbie on for their "date nights" or call it respite without having to pay her or use their paid respite hours. I don't think she was ever brought there to be anything but surrogate oldest child to be taken advantage of in that way, and then they realized they could pawn some of the grunt work of their professional day to day off on her as well. Now they have her packing envelopes and sending emails too and Priscilla has more time to slap cheap ass clown makeup on her face during livestreams - oh, sorry, I mean, work on her business.