Attacks, praise stretch truth at GOP convention - Yahoo! News

On top of that she is now accusing Obama and Biden of bring her family into it political arena:

Palin: Democrats spreading misinformation and lies - Yahoo! News

The moment her under-age daughter went and had sex and became pregnant, the abstinence argument wasnt going to fly anymore. Because we can see all so well how that prevented her daughter from opening up her legs. Therefore since thats part of her political platform, its fair game.