My sister had a friend who had a guest with an 11 year old boy child and a 2 year old; The boy was bedded on her new mattress work circa £400.00 just new and wet it. The mother neither merely said sorry; But the hostess is very upset and has not voiced this to her guest; I told my sister that she [the hostess] should seek to claim for damages for the cost of replacement of the mattress from the guests home insurance policy AIBU? Considering, the mattress cannot be washed or dry-cleaned, further the guest did not seek to ensure the mattress was protected, knowing her son had the potential to wet the bed. I personally would have been livid, now the hostess has either to live with the smell or replace the mattress at her on expense.