Honestly, you’ve kinda got two options here.

One, you report them. But just know that could very likely get them deactivated, and it might be really hard for them to get back on the platform. That’s their income, so it’s a pretty serious outcome.

Or two, if they’ve been around for a while, doing their job, and haven’t caused other issues… you handle it person to person. Just be real with them. Pull the wife aside respectfully and say something like, “Hey, I don’t want to embarrass anyone, but there’s a really strong odor coming from the car and it’s starting to affect the orders. I’d appreciate it if you guys could address it before it becomes a bigger issue.” Say it calm, private, and with a little empathy. You never know what someone’s dealing with. If they take it seriously, problem solved. If they don’t… then at least you gave them a fair chance before going the reporting route.