Had I accidentally broadcast a personal message?

A freind from Pennsylvania wrote and said long time no hear and asked what I was up to. I thought, well, I'll tell 'im. Why not? So I told him about my love life. But when I looked at the message in "sent messages" it had a dozen people in the "to" field. Quel gaffe! I was afraid I'd sent this very personal message to everyone I know!! But on second inspection it only looked that way because the conversation had branched off from one of my "dear everybody" letters. In fact I had only sent the message in question to one recipent.

Now, if anybody besides Bob actually *did* get letter about my love life tonight/this morning, please let me know!