Book 11 in The Positions of Love
It's Halloween, and Matt's coworker Roxie has invited him to a costume party on that spookiest of nights. He's afraid he'll have an uphill battle convincing Vic to tag along, but to his surprise, his lover jumps at the idea. Matt chooses a pair of police uniforms for them to wear, and looks forward to a little sexual role-playing once the party is over. Nothing like a pair of handcuffs and a game of good cop/bad cop to get the blood pumping.
But Roxie calls with a pool emergency an hour before the party starts. Because Vic isn't in costume yet, Matt goes on ahead alone. When his lover shows up for the party, Matt's surprised to find he's not dressed as a cop. Instead, Vic's latest superhuman power has created a costume of its own, with comic results.