[ And this is where he seals his own fate. Because he wouldn't lie just to make sure she wouldn't celebrate his birthday. ]

...no. Normally, people celebrate their birthdays with a party or a small celebration, like a lunch or dinner. They normally receive gifts from people they're close with.

But we don't need to do any of that for me. I'm fine treating it like any other day.

[ There aren't that many people who would be happy that he was born, after all. ]