I flew to the US early last year to visit my girlfriend with the intention to return, then we decided to get married. I've overstayed my allowed time on my Canadian passport (ended late last year) and now we're starting to file for the Adjustment of Status (I-485 and the whole package). My wife's parents are considering co-sponsoring with the I-864, but only if it leaves them legally "safe". They don't want to do anything that could put them in any questionable legal standing whatsoever. If I moved into their house after my allowed stay of six months expired, and they co-sponsor me, would they be technically breaking any laws, and what ramifications are associated with that? Thank you very much for your time and response!