The pictures here seem to confirm it. H/T Andrew Sullivan.
But now she has admitted that her daughter is currently pregnant, and frankly it sounds like it might be a bit of a shot-gun wedding.
Someone has written about Sarah Palin that she has that "naughty librarian vibe". God I love that vibe, but I think this is going to turn out poorly for the Republicans. An army of garbologists is even now descending upon Alaska to root through every corner of her life. If she ever whipped her top off to go swimming in the bay among the killer whales, pictures will hit the Net. If there's a sex tape, well, we can only hope there's a sex tape...
(On a more serious note,the revelation re Bristol Palin is a result of the sleazier allegations. Specifically, the pictures which showed a non-pregnant looking Sarah with a pregnant looking Bristol, and which were used as evidence that Sarah faked having a baby to cover her daughter's pregnancy, were almost certainly taken more recently than claimed in the first stories. In them the daughter is pregnant now, the mother pregnant no longer. And the rumour mongers who pushed the original tale had in fact discovered the daughter's pregnancy before this was made public by the family, then juiced the facts for maximum scandal value.)