Succubus' Breath - A forbidden spell

You have no idea how the torn page that contained this delightfully named spell got into your Alchemical Reagents: Volume IV, but you have been so excited to try it out.

Calming your breath, you focus and begin to draw the runic spellforms into the air around you. Combining weaves of fire and shadow into a beautiful tapestry your spell comes together. You are beginning to sweat from the effort when at last you lock the final component into place and like a living thing the spell shudders.

And then it collapses into a puff of purple smoke.

"What? No!" Dropping to your knees you can do nothing as the last traces of the spell vanish around you.

Frustrated, and horny you sit on the floor considering your options.