My sister-in-law has taken my niece and nephew to stay with her mum for a week over Christmas with her sister. Her mum lives in Wales, a tier 4 area so she shouldn't be staying there and having contact with her mum. She will be back on the 27th December when the children will be staying at my brother's house (their dad). I have so many issues with this. Firstly I feel she shouldn't have taken them as she is putting them at risk. She will also be putting my brother and my parents at risk as the children will be around them when they return. The children will be returning to school when they could be contagious. My sister-in-law is a teacher so she will be putting her class and the staff in her school at increased risk and her sister is a hairdresser who has appointments 2 days after she returns. Should I let the schools and her sisters clients know about this? They are being very selfish putting others lives at risk.