For background, DH and I both work full time. We have two kids and have pretty equal roles in their care, DH is hands on with the kids and the housework. If anything, DH is currently doing more during Covid because we're unable to access after school care and his hours are flexible and mine are not so he's doing the pick ups.
With regards to our families, I leave him to deal with his and I deal with mine in terms of communication, arranging visits, buying presents etc. I should also add that due to my parents divorcing and re marrying my family is twice the size as his.
Despite all of this, every year at this time the messages start coming from his family to me and me alone, asking what DC would like for Christmas and to provide pictures of the kids to put in an annual calendar etc.
I've already had one message from SIL a couple of weeks ago and at the time I said I was snowed under but I'd get to it if I could, but if she needed things quickly she could contact DH. I've just had another message and I've straight up told her to message DH instead because I'm too busy, but now I'm feeling guilty.
I am too busy. We had to take a couple of weeks off the other week between us when the kids needed to self isolate, and I've fallen behind on some projects. I've also started getting these sort of requests from my family, I'm supporting a close friend who's Dad is dying, and frankly I'm fed up with the idea that I'm the automatic choice for these sorts of requests, given that DH is more than capable of responding. It's also notable that my family would never dream of contacting DH for this stuff, probably because he's a man 