Suggested that maybe they have melrose as a third since they both found melrose attractive/were all good friends and Vivian was having a hard time trying to get sexual with aster at their current size.

Melrose was kinda on and off as needed (also good friends with them both) until year 5 (where we are current timeline) when she officially was there permanently and became part of their throuple. Aster was spending most their time with her at home so then it was viv that suggested

Aster finds the whole scenario very attractive/likes to be doted on by Vivian and the caretaker but due to past trauma worries a lot aboutttt it if that makes sense… they’re not an unhappy character!

I think overall even Dexter knew he was/wanted to be at least 500 versus aster had horrible eating habits and just somehow ended up that big one day and was like “ah how’d that happen” once the caretaker character appears they do lose some weight (while caretaker gains some lol)