Gossip Girl returns for its thirteenth episode tonight entitled “Thin Line Between Chuck and Nate” and if you’ve been watching the show then it won’t be hard to guess who is the cause of the hate between those two. Ah yes, the not so lovely Blair. Last week Chuck promised Blair he’d hang their secret over her head to ruin her relationship with Nate. Eventually Blair told him to stuff it and tried to go on with her relationship anyways. Well this week Chuck isn’t taking all of that lightly and clearly still seems to be hung up on Blair. It’ll all come crashing down on Blair when Chuck reveals quite the nasty truth about Blair to the Gossip Girl.

Thin Line Between Chuck and Nate - Gossip Girl takes pleasure in reporting that Serena van der Woodsen (Blake Lively) was spotted buying pregnancy tests. Of course, on the Upper East Side, the truth is often even juicier and more scandalous than the gossip, and this time is no exception. Leighton Meester, Penn Badgley, Chace Crawford, Taylor Momsen, Ed Westwick, Kelly Rutherford and Matthew Settle also star.

Try and guess who the pregnancy tests are for and you might be surprised. By the end of the episode you’ll also get to see Dan’s little sister Jenny finally rise to the ranks of acceptance in her clique as another falls from its glory. Don’t forget ol’ Rufus either who will repeatedly remind us that he’s “new to this” dating game as he fumbles the hand off from one pretty lady to the next. Tough life, huh?

Preview video clip from tonight’s episode of Gossip Girl:

Gossip Girl airs Wednesdays at 9pm on The CW.