Birthday reward

My friend will be in town next week so we’re planning to go to the Cheesecake Factory for lunch on the 17th. My mother’s birthday is the 23rd and she loves the Godiva chocolate cheesecake. She won’t be going with us, but I was wondering if I would be able to use her birthday reward to take her home a slice on the 17th? Would they let me do that, or do they need to check it’s my actual birthday?