The show's Big Birthday Battle kicked off on MTV last night and viewers saw Marnie and Aaron arriving at the Newcastle house together - but they still aren't an official couple.
Which baffles Gaz!
Speaking to the Confession Cam, he said: "For me, the best thing to happen for Marnie and Aaron would be for them to give it a go. Aaron has said he's not seeing anyone else, Marnie quite openly says she likes him. Why aren't they making it official? Why aren't they boyfriend and girlfriend?!"
Meanwhile, returning Sophie Kasaei seems equally puzzled by what is going on.
"I need to know what the hell is going on with Marnie and Aaron!" she said. "Obviously, Marnie is my cousin but I know she can be a bit of a player and she has her guard up. I do like Aaron and think he's a good lad but I just don't know if it will ever work out. Can Marnie even hold a relationship because she hasn't had that much luck in the past."
"If they ever do get together I would enjoy being at the wedding," added Sophie. "Obviously I would be best woman! But living in this house? I've had a boyfriend living in his house and it's hard."
Marnie and Aaron have left everyone rather confused about their relationship status since filming on Big Birthday Battle ended. In a recent interview, Marnie had criticised the way Aaron reacted to her bisexuality revelation, suggesting he hadn't been as supportive as he seemed, although he countered this by saying he was supportive.
Then this week, they cuddled up together for a cosy Instagram photo in which Marnie called Aaron her "favourite work of art", suggesting all is actually fine between them.
Geordie Shore: Big Birthday Battle continues Tuesday at 10pm on MTV