My DP and I live in a rented cottage on a property that DP is the gardener of. It’s quite remote and the main house is just down the hill from us. We have a good relationship with the landlords daughter and SIL, who live in the main house, but are not ‘friends’ as such. Just get on and have a chat when we see them. Our landlord lives abroad so they are our main points of contact for anything cottage related.
The daughter has asked DP if their grandmother can stay in our cottage over Christmas when we’re away. I am uncomfortable with this - we don’t know this person and all of our belongings would still be here. Whilst we get on with the owners/landlords, that is the extent of our relationship. I don’t think I’d mind as much if we had a spare bedroom and could close off our bedroom/living area but it’s a tiny one-bed so they would be staying in our bed in our bedroom. Personally I would never ask a tenant if I could use their home for my guest but perhaps DP working on the property blurs the lines a bit.
Is it reasonable for us to refuse the request? And how can we refuse the request without seeming rude?