Write them ALL an unequivocal message telling them that you have just had surgery and have been instructed absolute rest.
That any physical effort whatsoever will probably result in burst stitches, excruciating pain, setbacks that will mean your recovery will take longer than expected.
That you'll be delighted to see them and thank them all so much for being there and stepping up with cleaning, cooking, tidying and childcare while you're convalescing. Send a shopping list.
Possible outcomes:
1 They'll cancel. Job done.
2 They'll come and pick up the cleaning things and get on with it - meanwhile you'll be playing up the invalid needing waiting on hand and foot. Job done.
3 They'll come and criticise you - if so, as soon as they start, your entire conversation will then be detailed descriptions of your surgery, how long it took, what they did, how much of a scar/stitches you have, what level of pain you are at, how much medication you're on and what it's for, exactly what doctor's orders you're following, in as much detail as possible.
Any future criticisms - just replay all that. 'Your house was a tip when we got there' 'doctor's orders were no housework at all because (repeat the TMI).'
And remind them that your husband, who actually invited them, will be doing all the hosting and cooking etc. Be very positive and happy about that.
You'll either get your house cleaned with them there - or if they cancel, or go early, peace and quiet with the house on your terms til you feel up to it.