Blake And Penn PDA Obsessed?

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We all know that one couple who can't keep their hands off each other, and are so all over each other in public, that we cant imagine what they're like behind closed doors.

Well it seems Blake Lively and Penn Badgely have been taking their PDA a little too far lately. A source tells Page Six, "They're constantly making out, and it's making everyone uncomfortable."

Sources from the set say Blake may be feeling a little threatened by the brunette on set who plays Penn's love interest. The crew is even playing favorites by not being too friendly with the new girl for fear of making Blake mad!

We don't blame Blake too much though. It would be awful watching your guy make out with another girl every day at work!