I'd say if intimate activities occur in the shower (You're both naked and together getting wet), you're on the clock; if you're just chatting, then no.
I prefer to shower with the provider after the deed and extend the intimacy if they will agree to it, but at AMPS, I kinda like the shower before to heighten arousal before hand (I'm in the 'older' category, I need all the arousal help I can get...)