The power of 13

Do you believe in the power of numbers?

Seems like the number 13 has become my sisters lucky number. This number keeps popping up in different ways for her. For example:

There will be 13 yrs between her two children.
There will be 13 yrs between her boyfriends oldest child and this baby.
It took 13 years for sister and her boyfriend to get back together.
There is 13 years between my sister and I.
There is 13 yrs between her and her oldest brother.
Her mom was 31 when she had her (13 backwards)
She will be 31 when she has this baby.
She saw the baby in the 13th week. (ultrasound)
Baby is due March 13th (3-13-10) 3+10=13

Any one wanna take bets that the weight will somehow be tied to the number 13 too? I will keep you posted!!