Sarah Jessica Parker and a nanny kept their eyes on the actress's young twins daughters, Marion and Tabitha, yesterday as they walked home in NYC. Marion and Tabitha were armed to face the cold weather in their almost-matching Patagonia coats. The Parker-Broderick gang just rang in 2011 together, and James Wilkie is already back to his usual school routine. Marion and Tabitha are still a bit young for class themselves, so they were able to spend an afternoon out shopping and walking around the leftover snow with SJP. Sarah Jessica is currently enjoying family time, but soon she'll be required on the set of her new comedy I Don't Know How She Does It. The project costars Mad Men's Christina Hendricks and Olivia Munn, of the new comedy Perfect Couples, and SJP will be doing double duty as both actress and producer.