They proved to her friend that she is a lesbian cunnilingus

Two enthusiastic girlfriends began to kiss among themselves, not paying any attention to their neighbor, who looked at them enthusiastically and when she could not stand it, walked on their knees and asked to take her to her. The girls surrounded her with their attention and caresses quickly realized that they had wet and their fingers without lubrication entered and left. And when they connected the tongues, she realized that also a hidden lesbian and also began to lick.