I live in Scotland and am doing everything as advised with regard to social distancing - staying at home with DH and no visitors. My brother lives in England with his girlfriend (who has three young children who live with their father). The children are visiting between both parents. My concern is that brother and his girlfriend are collecting my mother who has various age-related illnesses and they, together with the children are all meeting in my brother's house for dinner, before taking my mother back home. I don't know what the children get up to when they go back to their father's. I have spoken with my mother by phone who watches the news and is aware of the Coronavirus news but still allows these visits to go ahead. Brother is a bit hot-headed and difficult to reason with. Any hints on how to handle this from a distance? Thanks.