Things are heating up between Shawn Mendes and Camila Cabello--whether they want us to know or not.

Us Weekly reports that Mendes, 20, and Cabello, 22, were spotted by multiple eyewitnesses (and cameras) having a little more than brunch at Dottie's True Blue Cafe in San Francisco on Friday.

In a fan video shared by Pop Crave, the "Havana" singer and the Mendes are seen having a very intimate moment, including a little make-out session.

Entertainment Tonight reports that a second eyewitness spotted the two at the Golden Gate Bridge that same day. They told ET, "They were hugging and he was resting his head on hers [while waiting for a car].”

Brunch and a walk on the bridge? Sounds like a sweet day-date in San Fran.

The two singers have been dodging relationship rumors since Cabello broke it off with her longtime boyfriend, Matthew Hussey. Just before the breakup, the two collaborated on “Señorita,” which included a sexy music video.