We are planning on having family to stay (2 adults in an adult household) and are trying to follow the rules that B&Bs have. A friend has a B&B and has been very helpful.
Fortunately we have a spare room and bathroom - that is very important, so they have their own toileting and handwashing facilities and their own towels.
My family will be treated as if they are guests - so they're not allowed to help in the kitchen - we will have a spare kettle in their room, or we will make them drinks. We will use our extended dining table so we can eat together and be well spaced apart.
No sharing of communal items such as salt and pepper pots (we have more than one set, so not a problem). They can't help themselves to wine - they have to wait for us to pour it
or bring their own bottle.
Plus, lots of hand washing! so we wash out hands, set out cutlery for dinner. We clear the table, put dishes in the dish washer, wash our hands.
I don't think we have the virus, I don't think our visitors have the virus, but it's helped to think through all these things.
Would I go and stay in a small house with shared facilities? No. I'd stay in a nearby B&B and meet family / friends in a safe way.