Staying at gfs house

So far as I'm aware, and someone will correct me if I'm wrong, there are no written rules around this.

What DWP is more interested in is if you live/act as married couple. This is because some people do this in order to maximise their individual benefits (and tie-up properties!) but still spend the majority of nights a week together, share grocery bills etc.

In light of that, I'd say you staying over at her's once/twice (maybe even three nights) a week would not be a major issue.

Four/five/six nights would, I think, be called into question and could be considered living together as a married couple.

I'd also hazard a guess that the four/five/six nights total could be a combination of you/her both staying at yours or hers.

I think, then, you'd both be asked to explain your set-up to reassure the DWP there is no intention of/or actual fraud being committed.

There are probably some valid/justifiable reasons for situations like yours, but DWP would be judge of that not randoms on t'internet.

The bottom line is: DWP would expect an explanation beyond "I stay there 70% of the week" from you both if you are both claimants.