More likely she went out and Sean stayed in. Tbh there are plenty of kids who get burned because people are naive when it comes to the sun. Especially Irish people imo. It can happen and has happened to even the most cautious of parents. It’s her lack of regret that pisses me off. My own kids are very sallow but we have had a couple of occasions where they got some sunburn. One was with a UV top on so I’ve never bought them since. It can happen so easily. Usually a parent feels terrible, is beating themselves up and it never happens again.