A client wants all raw videos now! Should I give it for additional cost or not to give it at all?

Hi, so one of my clients is now requesting the raw videos for the event and says that *my mom really wants the unedited version of everything.*
I have already given them a huge favour by giving them raw photos. She has also requested me not to post her wedding photos, so I can't use that data for my promotion. The couple also got a discounted price while booking.
I don't want to give everything on the plate to the client and accept all the requests, I was told by mentors that there must be some boundaries as a business, do you guys agree?

Would you guys refuse to give the raw video data, or would you charge her 10% or 20% of the booked price for the raw data?