Been putting off telling DCs (10 and 8) until holidays started. Now the moment I've been dreading has arrived as older one accidentally read part of a letter in which our separation was mentioned. DC1 clearly upset. Tried to explain but awkward as didn't want DC2 to overhear. Ex away so not here to back me up and he won't be around for another 2 weeks. Any thoughts on how to navigate this tricky situation and what to say now and in general?