In the crossover arc, Tiffany calms Layla down from a psychic-induced bloodlust by letting her feed on her.
Faith regains consciousness, mere moments after Melissa has saved her and Tiffany, who covers for Melissa by giving Faith the credit. Faith admits her memory's fuzzy but, taking Tiffany at her word, asks if the hero gets a kiss. She does.
Adding to the heartwarming effect is, this is Faith we're talking about here! Seeing her, of all people, being so shy, is well.... I think Tiffany's expression says it for all of us.