AITAH for not helping my wife clean a house for her job?

My wife and her friend manage about a dozen houses that are rented in AirBnB or Vrbo. They have a cleaner that normally does the houses but my wife occasionally has to clean a house after someone checks out. Today she had to do one and asked me if I would help. I calmly told her no. She makes money doing this but if I clean a house, we don't get more money. I work too but am on an evening schedule this week so have some free time during the day but don't want to spend that free time cleaning a house. She seemed disappointed but didn't say anything.

Edit: I would like to add that I do help her at this job. I've helped replace lights, fix wifi issues, run supplies, etc. But I view those as small tasks that just help out. Cleaning a house is a little different in my opinion.