My SIL had a baby a few months ago. Saw baby in laws garden when lockdown eased initially. She now wants me and dp to travel to see her about 1.5 hours away in the car at her home. Our car is out of action at the minute so she's suggesting we travel with in laws and younger SIL - it's going to be some sort of garden party affair apparently but obviously to also spend time with the new baby.
So five of us in a small car together and I know younger SIL has still been going out to pubs, work and school runs.
I feel pretty uncomfortable about the prospect of this for covid reasons but I feel like older SIL will kick off if I say no we can't go. If I'm being honest I have struggled with my mental health a lot during lockdown and am only now slowly easing myself back into going out locally so the idea of travel is making me feel a bit anxious as well for reasons other than the covid worry.
Aibu to say no? Is this sort of travel even allowed at the moment outside of your bubble?