Now there is a string of logic to everything that happens here. It's like how sitting on your bed to do stuff that isn't sleeping a lot can make it harder to fall asleep. Getting into clothes that are meant for cleaning switches the mindset and does make it easier to get motivated cleaning.
The funny thing is, if they sit side by side, he might actually be less likely to see her blouse that way. Especially since she plans to continue the conversation past that too.