DD is 13 and has a heart condition which means she has been poked, prodded and generally messed about with by doctors all her life.
We had a disastrous scan at GOSH where the doc hit an artery instead of a vein and blood went everywhere, it really hurt too. DD is now saying she hates needles. 
I took her to the doctor yesterday, I think she might be anaemic, and he agrees and has booked DD in for a blood test next week, it's at 9:00am. DD is really not happy about it, but will be good and will go and have it done, she's resigned to just letting the docs have their way when things need doing.
But she's said several times she wishes she doesn't have to have the blood test.
I told her we will go and buy some cakes and have a nice morning at home, and we'll tell the school she felt woozy after the needle, she can go in halfway through the day. That made her much happier, though she's still a bit scared.
But I mentioned it to my friend and she is shocked that I would let DD miss 3 school lessons when she could actually be there 15 minutes after school starts.
AIBU to try and cheer DD up with a 'bribe' of a nice morning at home? She really doesn't miss any school usually, I don't think it will matter but my friend thinks I'm setting a dangerous example and that DD will 'try it on' in the future.