The simple one your referring to is the one I mean. I didn't date either otter and seeing Andrew on the island with Owen still faithful. In my mind it's an auto win of getting back with each other.
Head cannon ending I guess, in alt universe Owen has another panic attack and runs away so depends what you wanna see on the ending.
Whether you fuck Ollie or not it's the same Andrew ending, Marlo has a significantly different ending and I think that's all of them.
Love how dense Owen is tho, my god he really had zero clue about his cousin. Silly sausage 😜
If you want more the world of fanfics await, idk if there are any tho. Maybe one day I'll take a stab at it but got my own projects on the go rn.