BIL called today to let us know that one of the twins - Tori - has roseola. He wanted to let us know in case Cars comes down with it. I thanked him and hung up and started thinking about Cars' fever while we were away and the rash that covered his torso after the fever broke. A quick search online and I realized that is what Cars probably had while we were away (he was on antibiotics for an ear infection which we assumed was causing his fever but roseola is viral which would explain why the fever did not go away once the antibiotics started). So, looks like Cars gave it to Tori. Ooops!