Well it looks like (I hope) that Lindsay's love declaration happens after the kissing scene. And I hope that Danny tells her what he's done (or she caught them doing it). Because, seriously I can't see TPTB just suddenly breaking them up.
I think what's happened will literally give them both a much needed jolt, or a kick in the ass to start talking and confess their true feelings for each other. This would do that; Danny might suddenly realise he's going to lose her, and Lindsay might think she's already lost him. They both come clean with their feelings and find out what they want are the same thing; to be together. I don't see them suddenly making out, but I think they'd share a smile, maybe a hand hold or something. Hopefully it's sorted out in the episode itself because another week is going to make my poor heart explode
They won't break up. They can't break up
Fluff people, be optimistic! There's a reason for this storyline, and I can't think of anything else that would make any sense at all. So keep fluffing the gutter gas and we'll see come wednesday what actually happens.