Maybe he was rubbing off on her a little bit. She was starting to loosen up or something like that.
Leaning back a little, she let him soap her up quite happily. It was much easier than doing it herself and it saved time when they were both showering together and having to wait turns to get under the water. And it wasn't like she minded him doing so. She loved the touching as much as he loved doing it.
It was easy to have a routine when they were in a hotel and living out of suitcases all the time. When she was done rinsing, she let him have the water again. "We should except where I like to shower in the morning, and you like to shower in the evening." This was one of those rare exceptions apparently.