She's been a good friend since our DC were small (DS1 now 11)
We'd agreed to do a joint challenge in 2013, which involves some hard training and regular tough (for us) physical challenges. The training is going reasonably well and the first challenge is in a few weeks time - all booked and paid for.
She has now realised the date clashes with an important event for a cause close to her heart and has decided that she feels strongly she should be there. It's an event I would also go to in normal circumstances, but it doesn't have the same strong pull for me as it does for her. I'd go and feel good about it if I had nothing else on IYSWIM. I wouldn't cancel something that was important to me.
Anyway, she is a good person, who has worried over this, made her decision and apologised to me most profusely. I completely understand her decision.
I'm not sure what to do about the challenge. To keep on track, she intends to do her own thing, broadly similar to the organised event, the day before. I know she'd like me to go to the charity thing and I do usually support the work she does there. However, slipping from the schedule and making up your own rules seems like "cheating" to me and I'd rather stick to the original plan and do the challenge on my own. (Only cheating ourselves, no official rules, this is a challenge set by us, for us). It will be very hard for her to go out and do it on her own though - hard enough when you have lots of support around you. I can't do both - will need at least a week to recover afterwards before I can even think about doing another.
WWYD?