I would, without question, dismiss an employee if I found out that they had offered the benefit of something the company had paid for, to an non-company individual.

I'm sorry if that sounds harsh, but its fraud.

Conversely, I would be completely comfortable in said employee sitting with their family, without it setting any form of precedent.

Before we had the kids, Mrs PabloL regularly came with me on work trips if they were on a Monday/Friday or an extended period to somewhere nice. It literally never even crossed our minds that if we were in different classes, that she should get what my partners and I paid for....