Park thought House was making Mr. Weathers angry and warned him that they might be thrown out. House told her not to worry as if the transplant wasn't successful, Mr. Weathers would believe his son's death was for nothing.
House found a pair of glasses, but there was a knock at the door. House asked Mr. Weathers to ignore it (it was actually the police, who had homed in on House's ankle tracker) and found out that Stevie had only recently started wearing glasses. House dropped his cocaine theory and thought the glasses might indicate a brain tumor.