Vetrep - we don't know the background, i.e. what kind of relationship you have with your daughter's partner. However, these are difficult times for all, as everybody else has pointed out; son-in-law may well feel overwhelmed and stressed, and a joke may have come out sounding like a grudge.
Sorry; you are being rather touchy!
GO AND SPEND TIME with daughter, grandchild, and even (grouchy??) soninlaw! You have been invited; don't cut off your nose to spite your face.
If I was your daughter I'd probably be upset that mum prefers whatever activity you pretended to be engaged in, rather than spending time with me, after months of not being allowed!
Spare a thought for those of us whose grandchild is on another continent, and the family visit planned for this summer is not going to happen. If they lived nearby, NOTHING would stop me from seeing them.