The first thing you do is to dig into the trunk under the passenger side, that's where the locking pump lives. You will most likely find that she took a bath and didn't dry herself properly.
Lay her naked out in the sun to dry while you attempt to turn off the shower.
The main supply to the shower on an SRT6 is the 2 mounting points for the big ironing board wingey.

Welcome to the forum, Tammy !!!