I'd ask if the gossip was about KP also.. As I know you would
? It WAS about KP! If it were true (and a blind monkey can see that it's a ludicrous suggestion) it would be a nasty slur against KP not Pete since it would imply that she got herself impregnated by someone other than Pete while married to him!
Anyway, it's rubbish. And if someone is so blind that they can't look at Princess and see Pete's genes all over her, then it does call into question the validity of other 'reveals' they may provide.