Mommy knows what her big juicy wet lips do to you. You're obsessed, fixated on them. She knows she can control you, dominates you. When she teases you with her plump full lips, sucking on her fingers, covering them in spit. It's just too much for you to take. You're a good obedient boy, and you stroke your swelling cock over mommy's lips whilst she gives you light humiliation and femdom. You're not to cum too fast, you'll cum exactly when mommy tells you too. But the praise, lip teasing and spit is too hot to handle, and you cum before mommy can tell you to. As a punishment, she makes you clean up all the mess, and eat your cum.