My wife decided to solve financial problems by renting a room to a lodger. No written agreement, no screening, no background check--and I never got to meet the renter until he had already moved in. Was it even legal for a single party on the mortgage to rent out a room without the agreement of the co-owner? What recourse is there? Frankly, I would like to kick the renter and the soon-to-be ex-wife out, but would settle for at least knowing my options, at this point.