Is joking about being attacked sick, or funny?

In this scenario, ‘Jake’ tells ‘Anna’ that her husband ‘Peter’ has just been mugged, causing an already stressed woman to start panicking. However, it turns out they were only joking causing ‘Anna’ to brand them ‘sick’ which is understandable. But according to Peter, Anna is in the wrong for ‘overreacting’ and as I quote, he said “You have been in a mood all day” which is highly irrelevant because why would you purposely upset someone who is already in a mood?