Singers Shawn Mendes and Camila Cabello have been sparking romance rumours ever since their new single Senorita and its steamy music video came out in June. Over the weekend, the long-time friends again seemed as though they are becoming more than just friends when a source captured them sharing a kiss over coffee at a cafe in San Francisco.The two were photographed locking lips behind a glass window of the cafe as a passerby on the street looked on. Cabello, who was dressed casually in a blue and red flannel and with her hair tied back in a low ponytail, had her arms wrapped around Mendes, who opted for a similarly casual look and wore an olive green zip-up hoodie. The outing came a day after Mendes and Cabello were seen kissing at Dottie’s True Blue Cafe in San Francisco on Friday, as reported by a website. Mendes was there over the weekend for his tour stops at the Oakland-Alameda County Coliseum on Friday and Saturday night. (ANI)