Definitely the Chalet School, with Jo, who always seemed quite cool, married Jack later and had about a million kids in a house whose name meant "friendship" or something - all that mountain air, running away from Nazis and speaking 3 languages without even trying. I thought it was just me that had read all the Chalet School books! My mum had them all in hardback, still got them somewhere, and have read them again and again and again. Tophole (oops, might get fined for that "slang").
Am I sad???