Is it wrong to be angry?

So for the last three months I have been going to a personal trainer twice a week and been on duromine. My husband started a health kick three weeks purely for himself. Comes home every afternoon and runs and exercises for an hour. While I read to the kids, clean cook and bath. I asked him at the beginning of my journey to be supportive.

So he turns around today and proceeds to tell me that he has weighed in and has lost 6 kg.then he turns around and says oh that's 6kg in 3 weeks. Full well...

Is it wrong to be angry?