Everyone seems to forget that Kate always had people at the house helping her take care of the babies... friends, family, nannies, cameracrew, bodyguards, visitors, etc. Jon spent his time with his family or at work, not out on the town cavorting about, as I recall. He didn't appear to be a "two year old baby" when he was making money and doing diaper changes. Kate just acted however she wanted because remember, she's a TYPE A PERSONALITY. As if that excuses the bitchiness.
Good ole' Bob.