Who's The Boss - Billy?

My local UPN affiliate shows Who’s The Boss? episodes at 8 and 8:30 AM, at which point I’m usually half-awake and so I end up watching them instead of something productive, like the news or cartoons.

I was on vacation recently, and I missed the story arc that introduced [del]Cousin Oliver[/del] Billy, the five-year-old “our boy.” I checked Wikipedia’s entry on Who’s The Boss?, but to no avail. Can someone explain how Billy landed in Tony Micelli’s lap, and why he and Angela consider him “theirs?”

if i remember correct, billy was a young cousin or nephew of Tony Micellis’ someting happened to his folks and that old lady who Tony hung out with from Brooklyn took him to live with Tony

who’s the boss trivia

according to this site

He was a neighbor of the old lady who is named Mrs. Rossini