A quick update. I called her and apologized for not just picking up the new key and mentioning it afterwards. She said it was not a problem because we caught it and corrected it before the choir started singing, and she was not angry that I brought it to her attention.
God is working on me. She and I haven't always gotten along and I think He is helping me to work with her and helping her to work with me. He deserves all the glory and the praise! I am thankful He is helping me to develop a spirit of cooperation. 
This is very encouraging. I don't get along very well with the other keyboard player in our church and i get very irritated at times but have been able to control it. But i realize now that it is not beneficial or godly at all. I am going to make an effort to get along.
When i am on keyboard and someone has decided to change the key at the last minute, i do get very very irritated but i go with it. I think its because i have relied too much on muscle memory for that song so when i play it in a key, i get so used to the fingering that moving to another key starts off awkward.
When i am on guitar i don't care what key you lay it in. I still get irritated when they key is changed, but that is only due to the fact that i am a straight kind of guy. If we do something one way, i don't see the need to change it.