Alvin "I've seen Dave with this new girl, I've never seen before." is looking out the window through his binoculars

Theodore and Simon abruptly get up and run towards the window and look out

Simon: "I have a feeling this can't be good."

Theodore (nervous): "She is pretty."

Alvin and Simon stare at Theodore, not amused

Alvin: "What if they're interested in each other?!"

Simon: "Don't be stupid, no one wants to marry Dave, we've already ruined it with Julie."