Forwood will soon be moving forward on The Vampire Diaries... but to what end?

Just as this couple is growing closer than ever - increased hormones due to one's supernatural status, as well as a torture-loving father, will help any tandem along - producer Julie Plec has a warning to fans:

"Something will go terribly wrong," she says of Tyler and Caroline. "They'll struggle this season."

Look for this relationship to take a turn on episode five... toward a baby?!?

"We've said two things on our show, very clearly," Plec teases. "Vampires can't procreate, and yet, vampires bodies work like anybody else's. So, I don't know. Door's open to take either rule."

That's nice and vague and intriguing. Check out the official promo now for this Thursday's "Disturbing Behavior" and then view the following clip, which focuses on Forwood:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.