Believe her.

“So it is not a sin for us to lay with each other?”

She smiles warmly. “No my love, it is good. As a man would lay with a wife, a man shall lay with the Succubus.”

‘And a woman, does women lay with Succubus?” You wonder as she does have man parts.

“Subbubus can not seed a woman, they can only draw power.”

“But, how.” She smiles as if knowing your question. “A Succubus is seeded by man.”

“Oh.” Your not sure how it works but you find yourself lost inner eyes as she leans close to you.

“My love, stay the night, if you still wish to leave at sunrise, then promis me you will use these gifts to protect the village.”

Those are words of truth. A monster would not ask for a person to protect the village. She must be true in her words. No evil creature would bestow such gifts, no evil creature would want the protection of a human village. She seeks companionship, she seeks love. Evil creatures do not seek love, the are worse then animals.

She reaches up and starts to undo the straps on your shoulder. “Let me show you the promis of our love”

Now that you know something the elders have kept hidden, perhaps it is okay to submit to her desires. As you look at her round breasts perhaps it is okay to submit to your desires.