On Monday, Bella Thorne posted a photo of her makeout session with YouTuber Tana Mongeau onto Twitter.

Bella Thorne making out with YouTuber Tana Mongeau
photo: Twitter

"Who's shook?" Thorne prompted her followers with a cheeky caption.

But Thorne's followers were admittedly more confused than "shook."

Is Bella Thorne dating Tana Mongeau?
photo: Twitter

Some fans were startled by the kiss because Thorne and Mongeau have a complicated history.

Does Tana Mongeau hate Bella Thorne over Scott Disick drama?
photo: Twitter

Back in June, Mongeau posted a video onto YouTube titled, "I tried to fuck Scott Disick. Now Bella Thorne hates me." In the clip, Mongeau explained that she once flirted with Scott Disick at an EDC party in Las Vegas in front of Thorne around the same time he and Thorne were supposedly an item. 

Mongeau claimed that Thorne was upset that she had danced with Disick and immediately began to "hate her."

However, Thorne's latest Twitter photo proves otherwise; the women appear to be on good terms. 

But others were more shocked to learn that Thorne isn't straight.

Is Bella Thorne gay
photo: Twitter
Is Bella Thorne gay?
photo: Twitter

However, Thorne's bisexuality should come as a surprise to no one.

Bella Thorne reveals she's bisexual on Twitter
photo: Twitter

Last year, a fan asked Thorne if she was bisexual. Thorne responded with a simple "yes" and has never tried to hide her sexual identity since coming out. 

People seem to forget that Thorne is bisexual.

She is equally attracted to both men and women; however, anytime she's seen with a woman, fans brush her relationships off as "just a phase."

Fans find it frustrating that Thorne has to repeatedly explain and "prove" her sexual orientation.

Is Bella Thorne bisexual?
photo: Twitter

Every time Thorne is linked with a new partner, critics are quick to cry out, "But last week you liked women!" or "I thought you only dated guys," blatantly ignoring Thorne's bisexuality. 

Two women sharing a kiss shouldn't leave people "shook."

Is Bella Thorne bi?
photo: Twitter

There's nothing odd or "new" about a same-sex embrace. 

Despite Thorne's efforts to share her sexual orientation with fans, people still accuse her of exploiting the LGBTQ community for her own popularity.

Is Bella Thorne bisexual?
photo: Twitter
Is Bella Thorne bisexual?
photo: Twitter
Is Bella Thorne bisexual?
photo: Twitter

Some fans blasted Thorne for fetishizing bisexuality.

Is Bella Thorne bisexual?
photo: Twitter

However, Mongeau confirmed on her own social media that this kiss was the real deal.

Is Bella Thorne dating a woman?
photo: Twiter

Thorne, meanwhile, continues to be shameless in her sexuality.

Twitter reactions to Bella Thorne's makeout photo
photo: Twitter

Thorne has made it clear that her haters can think what they want. She knows who she is and who she's attracted to, and she makes zero apologies for it.