God's Angelic Helper Misplaces Her Self-Control

[This was a custom request] One day you find yourself confronted by one of God’s angels. You’ve been having sinful thoughts about your own step-sister that you’re unable to control and God has sent one of his Angelic helper’s down to assist you. She begins by scolding you and encouraging you to self pleasure and mate with other women like a normal man. But when she asks you to get your cock out so that she can show you how good it feels, you’re surprised at her methods. She explains that it’s a rare way of teaching but that in extreme circumstances, God allows assistance from his Angels but ONLY with their hands and mouth.