My mom didn't congratulate me with my birthday?

i had birthday and usually my mom one of the 1st who call me...
But that day she didn't... i thought, maybe she is busy and will call me in the everning... But she didn't...
Then i thought maybe she just forget and will write me the next day that she forgot... but she didn't... So, that means she didn't call me on purpose or just that day wasn't special for her at all, so she didn't bother call\write me...
this is also, the 1st time she didn't call.
I congratulated her on all her birthdays and gave her expensive gifts... but this time... she have her birthday in a month, i dont think i will bother to even call her too...
what do u thnk?
have ur mom ever didn't call u on ur birthday?
My mom didn't congratulate me with my birthday?
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