We've offered to host my in-laws for an occasion, because our home makes most sense.
We've asked everyone to arrive from 5pm on a weeknight.
Several normal responses of "yes, lovely, what can we bring" etc etc. We've replied that there's no need to bring anything, we'll sort.
DSIL's reply is "yes, I'll be there at 4.30"
AIBU to think this is rude?