coworkers can be rude and nosey AF. I’ve had some like that, too. But lying about your age is not the way to handle it.

I agree. It would be much better to lie about their questions about being single with no kids…

“My family died in a horrible accident while I watched helplessly. I work this shit job so I don’t have to sit at home thinking about it.”

That’s guaranteed to shut them the fuck up and keep them from asking any more nosy questions.