Try Tricking

"Creature! I have returned with our supplies, allow me entrance at once!"

"Hmm... of course, of course..." It speaks, it's voice raspy and grating to your ears. "But I'm going to have to ask for some manner of payment. I've been stuck with this gate all day, with no visitors!"

You ponder this, and reach into your pouch- you've got some small count of coin with you. You extend an open palm holding a handful, to which the Demon just snorts. You grit your teeth, having expected that answer.

"Your earthly possessions are of no value to me, fool. Make good on your Mother's pact, and I'll let you in." As it speaks, it's manhood emerges, slowly erecting before you.

Your eyes widen in surprise, but this makes sense. Nobody knew how the witches had managed to secure the loyalty of the demons- but in hindsight, exactly what the coven of young, fit women had to offer isn't exactly a mystery.

However- this was not a part of your plan. How should you handle this?