Still trying to process but there it is. Last night was my hen do. Same time as my DHTB stag. All arranged long ago in my home town. Said friend invited to hen do, her DH to stag. They don't know my DHTB well but we have been friends since late teens (am 30yrs old). Her husband confirmed stag do attendance straight away. She made excuses (kids, etc) reg my hen. Today I find from other stags, etc that she actually tagged along with her DH with the stags?!? The only one there not a stripper and a wife, etc. Feel terrible, since they are essentially MY friends, but I had no idea. Just feel like picking up the phone and telling them to get lost and not bother coming to the wedding now... AIBU?