I wanted to go see Bridget Jones baby, but I think its a stupid movie because I'm assuming that when…

I wanted to go see Bridget Jones baby, but I think its a stupid movie because I'm assuming that when the baby is born they will have a DNA test which is unrealistic because one if the possibilities is the billionaire. by waiting til she's 15-20 weeks pregnant and paying 2grand you can easily find out by drawing blood from the mother...what's ,2grand instead of waiting, 9 months....am I the only one that feel like that's a waste of film?