Kendall Jenner and Justin Bieber were spotted engaging in a bit of PDA at Coachella, and Selena Gomez reportedly feels betrayed as a result.

Selena apparently suspected that something was going on between Justin Bieber and Kendall Jenner at last year’s Coachella, and feels like she’s been stabbed in the back all over again.

“Those Instagram photos of Justin and Kendall at Coachella just confirm what Selena thought all along…that Justin was cheating on her with Kendall. And it all started at last year’s Coachella. Both Justin and Kendall denied any type of romance at the time, but Selena always had her doubts,” a source tells Hollywood Life.

It was on Thursday of this week that Justin posted a picture of himself with Kendall Jenner–and they seemed quite involved with one another.

A photo posted by Justin Bieber (@justinbieber) on Apr 9, 2015 at 6:55pm PDT

Kendall Jenner is said to be the reason behind Selena Gomez and Justin Bieber calling it quits last fall.

“It stings. Seeing the recent pics of Justin and Kendall together is like a stab in the back all over again. It’s not that Selena wants to be back with Justin. It’s more of a betrayal thing. She feels betrayed by Justin and Kendall,” the source adds.

It has to be asked, however, why Selena Gomez cares what Justin Bieber does with his time or with whom? They are broken up, and she has supposedly moved on with Zedd. Is it because she suspected Kendall Jenner of stabbing her in the back a year ago and now history is sort of repeating itself?

Justin Bieber and Selena Gomez have become toxic. They need to stay as far away from each other as they can. And if that means that Justin winds up in the arms of Kendall Jenner, Selena simply needs to learn how to deal with it.

Do you think Kendall Jenner and Justin Bieber are romantically involved?