I think only you can make that decision based on the relationship with your in laws. My own parents are desperate to come down to spend Xmas with my kids having not seen them since August, but understandably really nervous given they live in a really small town and have pretty much self isolated again the last 4 weeks (they dont have room for us to go there).
(Btw, did anyone see how heaving Northcote was on Saturday with drinkers? This was during a supposed lockdown)
The first conversation with my mum seemed pretty aggressive also as she firmly told me we can see friends when they've left and there will be no trips to the pub. After my initial reaction of being told what to do by your mum at 50, I realised it came from nervousness and fright and not because she is trying to tell me how to lead my life. This year is different. I'd much rather not go to the pub, make them feel safe and feel I did all I can to shield them whilst they see the grandkids.