My take on it. From the sounds of it this elderly gentleman is retired from breeding, but was willing to 'help out a friend' and breed to her mare. Yes a huge mistake was made!! And maybe this is why he retired from breeding in the first place, my guess is it was such a routine thing for him, from previous years that when he teased the mare and saw she was in he absentmindedly then bred her with the horse he happened to be holding. I don't know his normal procedure, but I'm guessing his clients generally didn't live next door, and normally he may have been able to tease with the breeding stallion. In this case, from my understanding, he used this teaser stallion because he was easier to handle. Now as long as op is happy, I'm happy for her! I hope she gets what she wants!
As for me, depends I guess, if it happened as I think here, a favor to me from a forgetful elderly neighbor doing me a favor, I would be disappointed, as I aborted and tried again. If it happened with a professional breeder that I paid for the service, I would be hopping mad!!
I don't think this thread was started with any malicious intent, when I read the title, I was thinking it sounded like a thread to show what could go wrong (w/ actual experiences) when breeding, a good learning thread for new breeders or someone considering it for the first time! Give them something to think about! Although the first story didn't quit go along with that. I still think it would be interesting to hear of others 'breeding gone wrong' stories.