Re-watching, that Stug bed scene really was odd wasn't it?
I don't think Ste expected Doug to react like that, like it clicked in his head Doug was more worried about Brendan being around, than shoving him. I really am starting to think Brendan gets arrested and Ste doesn't know. Like it happens just before the wedding, so he doesn't get to make his phone call to anyone and then with the crash and everything, there are more pressing matters.
So maybe by the time Ste finds out, they are heading for their honeymoon? The airport scenes could be at the end of November and the two weeks from the wedding until then, Brendan either stays away from the village whilst on bail or isn't allowed out on bail. Maybe he tells Cheryl to keep it to herself. Then Ste finds out he was arrested and why (I can imagine Leanne opening her mouth). And then, boom. Dublin