As you, and your girlfriend were enjoying that month's convention, Lust arrives near you while carrying the stuff she purchased in a massive cart which could only mean trouble if you pissed her off when you crossed her path. Just then, your girlfriend stepped on Lust's tail without noticing, until the succubus screamed.
"Ow, watch where you're going, sasquatch feet," Lust says. "Oh sorry," your girlfriend explains. "That's a nice outfit by the way. I'm not usually into BDSM, but I appreciate the roleplay of any form of sex that can handle roughness." Just then, Lust looked back, and saw that your girlfriend stepping on Lust's tail, caused her to lose all the stuff she bought. "First you stepped on my tail, and now you made me lose my shit," Lust says, getting mad. "You will pay for what you've done."