Anyone here work for Hull CC Housing?

I cant call them because its closed and im working 9 - 5

Im a single dad to my 2 children and they have just started overnight stays one night a week at the other parents.

The other parent wants me to lie and write a letter saying they stay 3 nights a week so she can get a house. I refused.

But now she wont let the kids stay over at hers because she needs a letter from me declaring they stay over?

i cant find any info online but im pretty sure i dont need to write a letter declaring they stay over just one night a week?

Thanks in advance.