Song Tian's sudden thrust made Ren Yuxi moan, her small mouth couldn't accommodate Song Tian's big cock, and the thrust was quite deep. She quickly spat out his dick, turned her head, retched, her face flushed red, and her glasses nearly fell off.
Song Tian reached out to help her adjust her glasses, thinking, "This little slut... without glasses, she loses that scholarly vibe, fucks less interesting."
Song Tian fed his cock into her mouth again, this time not as deep. He took it slow, coaching her to relax her throat, wrap her lips around it, and lick with her tongue.
Under Song Tian's guidance, Ren Yuxi caught on quick, even surprising herself with how instinctively she learned, making leaps in her technique. When she relaxed her throat, she could even swallow almost half of Song Tian's thick dick.
Not more than three of the women Song Tian fucked could take that depth.