Can soneone explain what looking in a bedroom will prove.
A pensioner still has a double bed, probably had one for the last 50 years, can't afford a new single bed, does that prove they are cheating.
There is a bed in the spare room in case an adult child visits or grandchildren stop the weekend, are they cheating?
They still have clothes belonging to a deceased partner in the wardrobe, some can't bear to get rid of everything, do they now have to to claim the rebate?
The only way co-habitation can be proved is by someone watching from a car etc and seeing someone there in an evening and still be there in the morning, ie, observing overnight.