I think criticising her choices whilst she's been in Berlin or her messing about with flights during a pandemic is justified, but to criticise her for going between houses with her sister is a bit pointless if you think about it. If she is infected, her sister will take it to the other house. That's just my view, sorry- I think there are more pressing concerns than this, such as her changing her flights to spend longer on what is essentially an extended holiday during a pandemic, or her going shopping with symptoms