I like this blog from 23/6:
We're going with the rumor: Sarah Palin is not Trig's mother - 236 - News We're going with the rumor: Sarah Palin is not Trig's mother 
Sarah Palin looks amazing for four months after her fifth kid. A little TOO amazing.
A day after Sarah Palin
made us believe we could grow up to be president if this comedy writing thing doesn't pan out, we stumble across the greatest rumor since
Hillary Clinton is a lesbian- Sarah's 4 month old son, Trig, is actually her grandson. Trig's real mom, suggests the internet underbelly, is Sarah's teenage daughter, Bristol.
"
Comments from the left field" points out that Sarah never looked pregnant, and Bristol was taken out of school for 4 or 5 months because she got "mono," an illness we remember from a Brady Bunch episode. (Someone double check with
Michelle Obama.)
Would a 44-year-old woman with four kids out of diapers, embarking on her first governorship, really get pregnant? Or would a 17-year-old, living in a small Alaska town with conservative parents who didn't tell her about condoms, starting fooling around and accidentally get knocked up?
We hope it's not true, for little Trig's sake. But we also hoped John Edwards would never cheat on awesome Elizabeth with that toad Rielle. Sometimes politics is stranger than fiction. Frances Quinn Hunter and Trig Palin, America demands a day of bi-partisan paternity tests.