TMZ obtained the court documents, in which Cambeiro says she worked a 12-hour night shift for the couple three to four times a week from August 2011 to March 2013.
She alleges that Morissette and her husband was locked in Ever's bedroom for the entire shift, and wasn't allowed to leave for breaks or meals unless one of his parents was in the room.
Cambeiro's lawyer claims that the nanny, who was paid $25 an hour, was legally entitled to at least two 30-minute meal breaks per shift.
Morissette's representation has yet to comment.
Kate Middleton recycles dress at movie premiere
Beyonce flaunts bikini body, Blue Ivy in vacation pics