Throughout the two years of their on/off romance, the pair hadn't slept together but in next week's episode of Geordie Shore: Big Birthday Battle fans will see Marnie and Aaron finally do the deed, as they spend the night together in the sh*g pad.
And in a new teaser shared by MTV, Marnie tells Aaron their romance is a lot more "serious" now they have gone to the next level.
The morning after, Marnie wakes up and admits she feels all "shy" around Aaron. She says: "I've woken up in bed with Aaron, I just can't believe we've finally had sex and it was so good."
Marnie then asks Aaron: "What does this mean, then? We've took it to the next level now."
When Aaron pointed out that he wasn't allowed to talk to girls before they had sex, Marnie joked: "Well now, you're not even allowed to look at them."
That didn't seem to phase Aaron too much, though and he admits: "Me and Marnie have been on and off for two years. I'm just glad I've stuck by her, because that's the girl I want to be with."
They're not the only ones who will see their romance hotting up, however, as Gaz Beadle tells Charlotte Crosby he wants to commit. Yes, really!
After admitting that Charlotte is the only girl that makes him "nervous", Gary decides he wants to make things a little more official between them. He tells Charlotte that he's not interested in anyone else and wants the pair to start "seeing each other."
Now, that is a pretty big deal, right?
Geordie Shore: Big Birthday Battle continues Tuesday 17 May at 10pm on MTV.
Follow us on Twitter @RevealMag for all your celeb, fashion and beauty news!
Fancy winning some GREAT prizes? Check out Reveal Competitions here!