Tiger Woods - Knock, Knock. Who's There? Elin

It seems Tiger Woods got a visit today from an old friend -- his wife, Elin Nordegren.

Hopefully Tiger learned his lesson and keeps his balls on the green from now on

Take a look at the white Cadillac Escalade in the driveway of the family's home in Isleworth where we're told Tiger is now living. We're told Elin, who has rented a house nearby, took the Escalade to the house this morning and parked it in the driveway.

Interesting ... before driving over Elin dropped their daughter off at school, bought two cups of coffee at a nearby Starbucks and then went to Tiger's.
UPDATE: Elin's twin sister Josefin was seen riding with her on the way to Tiger's house.