Liev Schreiber hit the streets in NYC yesterday to take a walk with his oldest son, Sasha. It was the youngster's latest fun day out in their neighborhood after checking out Lady Gaga tunes with mom Naomi Watts earlier in the week. Naomi and Liev later reunited for an adults-only ride on their white Vespa. The Schreiber-Watts clan is together in the Big Apple following a long stint in LA. She has downtime with her three boys for the time being while work on her J. Edgar continues in Virginia, while one of her 2010 movies, Fair Game, just came out on DVD.