She mentioned on CBB he lived with his mother and he looked embarrassed by it. Not sure it was in the house, think it was one of those clips they show of them just before they go in the house but I remember it being said and his reaction because 1) he looked embarrassed she mentioned it and 2) made me flashback to the drama during the task where they had to be separated. I mean it's was obvious at the time they were acting up but I was surprised she so casually blurted that out if the plan was to go in and act as if they can't breathe without the other.