Happy Valenkink's Day

(Suncoast Society #44, BDSM, various, HEA)
The Suncoast Society is having a BDSM Valentine’s Day party, and “Aunt” Tilly’s watching the kids while everyone else attends the “adult” festivities. She’s planned arts, crafts…and combat practice.
What could possibly go wrong?
Let’s just say it’s a good thing some of the Doms have well-stocked first-aid kits in their toybags.