Do I have to give every employee the same work hours?

I have an employee that has a son and seems not to be able to come to work on time. Can I allow her to work 8:30 a.m. to 5:00 p.m. with a half hour lunch and not give the same option to other employees?

Yes. You can customize work schedules to suit your specific situations--if you want to do that and it does not negatively impact the productivity of the operations at hand.

What you have to remember is that other employees may feel that their personal situations also warrant special treatment (i.e. unique/altered work hours).

So to some people, doing this for one employee would be perceived as "a slippery slope." Still, it is your decision as the owner/manager of the enterprise.