i don't know if i missed it but it was not clear fom my subtitles, what happened to the husband? did he killed himself, had accident or run away? i think they mentioned they found camera, but no body. and to stay on this topic, why would he kill himself, it's not like suddenly something changed in their boring life

also the last night before leaving, after the roof the cousins didn't have sex, right? seemed very tense between them, was expecting it any moment and was positively surprised that older cousin seemed not to take this opportunity

also why so cold goodbye just with shaking hands and no hugs, is this normal in Japan?