My aunt said she was getting dressed
What was she getting all dressed up for?
We were at a beach and she decided to go swimming. She told me she was going to take a shower and began stripping off. I left it at that and I wasn't going to stare at her while she was undressed.
It's good that you weren't going to stare at her. That would be weird and uncomfortable.
I'm a respectable man. I did not want to see her naked, so I made sure I left the room.
Sounds like you get the idea. If someone is changing, you just don't bother them.