That ain't a dream, ObliviousDude.
That there is Aaron's atm principal nightmare, of him being "cucked" by his slutty momma with a David-UncaPeter amalgamation while he's watching them, all depowered, dumbened and abjectly watching.
The nightmare's further progression is where she's gaslighting him, offering him blowjobs & more while effulging & oozing with his worst enemy's juices!