Every week or so Ron would check in on Harry, Ron knew he had trauma- and Harry took in a kid when he was 17, so he's stressed out as well. Ron would make him go to therapy, and watch Teddy for him- every month Harry would say he and Teddy were sick. Every single month, and they'd be 'sick' for a week and a day, always the week before the full moon, then the day after.. Getting suspicious, Ron went to go check on them anyway... "Harry?" Ron asked, letting himself in with his spare key.