A bit of context for you guys:
I am a freelancer in the entertainment industry and I'm traveling around Europe with some artists so I see my cousins only a few times a year. They always have the same wish for their birthdays, a trip to a show with me and my mother. So we gifted them tickets to a show including a train ride to the venue and back. The train takes around 2 hours to get there, the show has a length of around 3 hours.

A week before the show my mom got really I'll so she wasn't able to go to work and had to cough really bad. Like really really bad, she could only stop when using a inhaler for around 2 minutes.

In the morning, 2 hours before the departure she has to cough every 2 minutes so i tell her that it wouldn't make any sense for her to go with us to the show, not only because she wouldn't enjoy it but also the rest of the guests would be annoyed. (We had seats right in the middle between other guests) She then said that its okay and she just wanted to say hello to my cousins before we would take the train. Half an hour before departure she had to cough so hard that she had to throw up. At the train station she then told me that she would come with us.

I said that if she would come with us I wouldn't go because I can't support that. She got really angry but we went without her in the end.

Now I feel bad on the one side for not giving her the option to see the show but on the other side I think that the day would've been ruined for my cousins if she would throw up again.

So AITA?