Guy Ritchie

But why? For what? So many questions!

Yes, that's none other than Guy Ritchie in the pictures above, seen entering his ex Madonna's NYC apartment Tuesday night around 8:45...

Our X17 photog on the scene tells us: "Guy looked a little nervous, but excited as he headed into the apartment - he was with someone who appeared to be his bodyguard. Guy was somewhat hesitant about approaching when he saw me standing there with my camera."

Maybe he was there to visit the kids, but isn't 8:45 p.m. a little late for a visit with young children?

PLUS, our photog stayed outside the apartment until midnight and Guy never came out!

What does this mean? Could a reconciliation possibly be in the works?!?