What better way to clear out the energy of old romances!

Kristen Stewart and new girlfriend Sara Dinkin celebrated Valentine's Day early yesterday with a trip to the sweat lodge in LA, and both ladies emerged looking sweaty and relaxed after their session.

Their relationship isn't without its drama, though!

The Twilight star's supermodel ex Stella Maxwell is reportedly none too pleased that her chick has moved on so quickly with the Hollywood stylist, and has no problem letting her feelings be known.

"Kristen falls so easily and she is really into Sara. But her model ex (Maxwell) told everyone that Sara is a rebound and contacted Sara to let her know that Kristen is only using her. [Kristen] flipped out on Stella and told her to leave her and her life alone," a source dished to Radar.

It sounds like the Victoria's Secret stunner was the one who messed up, though, by using their high profile love affair to further her fame and career.

"Stella f****d it up, not Kristen. Kristen wanted something real with someone low key and Sara doesn’t care about the spotlight. She treats Kristen like a normal person, just as she is," the source added, noting that the former pair made a pact to keep any future dating out of the public eye, which obviously hasn't happened.

K-Stew is so smitten, it appears she's thrown the rule book out the window.

"Kristen couldn’t help herself and decided to go public with Sara almost right away. Kristen and Sara are already talking about moving in together," the insider revealed.

She's certainly a heartbreaker!