Because it's been done the other way around so many times...
Mrs Richardson takes Douglas to the cleaners, and he finds himself homeless. With nowhere else to go (brother is out of contact playing doctor in a third world country) he goes to Martin. He expects to find ridicule, he's earned enough of it, what he instead finds is an understanding pilot and five students who prove to be very recourseful when it comes to building a bedroom out of a living room.
Douglas moves in...
Mrs Richardson takes Douglas to the cleaners, and he finds himself homeless. With nowhere else to go (brother is out of contact playing doctor in a third world country) he goes to Martin. He expects to find ridicule, he's earned enough of it, what he instead finds is an understanding pilot and five students who prove to be very recourseful when it comes to building a bedroom out of a living room.
How it goes from there is up to you.