Here we have Adrian and Samantha, taking a nap together on the couch. They may bicker a lot, but they really do love each other. Though they may not readily admit it.
As for why they're together, I think that Lance and Celia are babysitting their kid sister so their parents can go out on a date or something. These two probably got all tuckered out from playing all afternoon and fell asleep watching a movie that Celia had prepared for them.