The Insider.com

For Dair 'shippers like myself, Monday's all-new episode of Gossip Girl -- where Dan and Blair finally consummate their long-percolating relationship -- has been five years in the making.

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But anticipation and ecstasy can be a dangerous bedfellows, leading to disappointment and agony -- at least that's what promos for the episode, titled Con-Heir, lead us to believe.

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Let's not jump the gun, however -- because foreplay is half the fun. But as you can see from this Insider.com exclusive sneak peek, Dan and Blair can't even get that part right as countless unforeseen factors stall their sexytimes.

Gossip Girl airs Monday at 8 p.m. on The CW.