NC as family are on here.
I'm shielding and have barely been out apart from quiet walks since March so am prepared to hear that I'm BU.
My brother is taking his DC to a fairly busy zoo next week. They refuse to make the DC wear masks at the moment so are unlikely to wear them when they visit the zoo.
For background, during the last month or so they have been visiting us and trying to socially distance in our garden but it's quite tricky as the DC are so young. I feel that knowing they will have been somewhere so crowded makes me not want them to come round to our garden (as I have said it is very hard to SD at the best of times)
Am I being overly cautious?