Me (tier 3) db (tier 4) and dp (tier 3) all live in different areas.
Obviously this year I haven’t been able to see either of them or the rest of my family even in the summer my dm said she can’t visit as she’s scared of catching COVID19 and couldnt risk passing it onto DGM who is currently having chemo, fair enough or so I thought.
It turns out she’s been visiting db and SIL and keeping quiet about it. I found out the other day as we was arranging to FaceTime and she told she couldn’t as they was going to db’s house... in a tier 4 area. My DB is a nurse who works on a covid ward and I know they won’t be making any social distancing from him.
AIBU to be upset? They’ve basically used covid not to see me for an entire year and have made me feel guilty over fb with silly statuses about missing my DC when they’re clearly not that bothered to be breaking tier rules and seeing my DB where they have a higher chance of catching it than what they have of driving to see me? 
I don’t even know what to say to DP as it’s really upset me.