Do you think Finn and Jake reincarnation at the end mean that they will never see their parents or friends again, even back the Dead Worlds ?

Like for example let's say that Finn and Jake are hypothetically reincarnate in Beth and Shermy.
When they will die again will they be in the Dead Worlds as Finn and Jake again or Beth and Shermy ?

Probably Beth and Shermy, so they won't remember their parents or their past friends.
Jake won't even remember Lady Rainicorn

So when they accept to being reincarnate, do you think they know that it was their last moment and memory with their relatives ?

I'm even wondering if they can talk to eachother in the Deads World, like if Finn was in the 37th Dead World can he communicate with his family in the 45th Dead World ?

I think it's so sad, i hope i'm wrong lmao ( sorry for the bad english )