I concur, especially since this is an unique case. I know that a general rule for CM is that you have to have your ticket scanned prior to anyone else entering the park, however there are a lot of CMs that can speak on that policy and report it. While I'm sure there are a lot of Comcast employees, I'm not sure how many are heavily involved in Disney, or Universal forums.
Also, I would imagine if she didn't go there herself, her employment would need to be proven. Which still kind of goes hand in hand to her being there. As from personal experience and general knowledge, any perks in relation to discounts when you're associated with a company, typically you have to showcase your employment in some manner in order to receive a discount.
As said previously, better to go to the source, to either confirm it's not an issue, or to ask the source if there's another way to use the tickets if she needs to be with you, or her employment is needed to be proven.