Credit: Instagram

Ashley Benson and Tyler Blackburn are adding fuel to those relationship rumors! 

Despite denying dating her co-star and on-screen boyfriend Ashley took to Instagram on Friday (July 12) to post a steamy photo of her and Tyler behind the scenes of Pretty Little Liars Season 4. OK, so maybe the pic isn't quite as steamy as it is silly (and a tad bit gross), but Ashley and Ty-Ty look awfully close. 

"This is how @longhaired_child and I like to rehearse our kissing scenes," she captioned the pic, which showed her and Tyler touching tongues. This isn't the first time Ashley and Tyler have gotten touchy-feeling in public. 

Back in May, the BFFs snapped a pic of themselves smooching during a night out in Los Angeles. "A French friendship," wrote Tyler when he posted the kissy photo.

We're not sure we'd ever go tongue-to-tongue with our BFF, but maybe Ashley is getting her Ty-Ty fix before he departs Rosewood for Ravenswood

What do you think, PLL fans? Do you think Ashley and Tyler are dating IRL or just super close BFFs? Sound off in the comments!