Then...I guess I'll have to make up for it and bake you two the biggest birthday cake I can! I know it might not seem like a big deal if you didn't have it, but it's...something all birthday's should have. You have a big cake and you can share it with all the people who are there to celebrate with you...
[Except Rapunzel never really got that. And she made her own cake. Mother forgot she had a birthday. Maybe she's doing it for Flynn since she didn't do it for herself.]
So I'll make one for you! Uh...unless you don't like cake, then I can totally make you something else.