I Kind Of Have a Job

A lady, who appears to be in her 50s, at the gym just offered me a job... at her house. I could sort of tell what's up. I have a strong feeling there's no job that she needs done. She's wealthy, though, and her husband died long ago. There's definitely money involved. I feel like I'm about to become a prostitute, or something in that ballpark. Should I do it? I have a few days to make up my mind and let her know.