@Perry101 IMO, this guest is bringing a few extra persons. Demanding a certain number of pillows is a red flag. Your pictures probably show the number of pillows available on your made-up bed, so you are not "un-accommodating" if you do not run to the store and buy more pillows.
If you are offering both the queen bed and the full sleep sofa for every booking, you need 8 pillows minimum. 4 on the queen bed, 4 in the closet with the sleep sofa sheets and duvet.
My setup is:
4 standard pillows for a Queen or Double bed,
2 standard pillows per Twin and
4 King pillows for a King bed.
All pillows are inside protective zippered covers and double cased (i.e., protective cover, plain white pillowcase and then the pillowcase that matches the sheets or duvet cover.)
I do not offer body pillows, pregnancy pillows, gel-filled pillows, buckwheat pillows, feather pillows, CPAP pillows, etc. Just quality down-alternative pillows from the big-box store.