Deep Water Episode 1: The 7 Burning Questions We Now Have

What’s the deal with Kate and her sister’s relationship?

Their row at the dinner party seemed to stem from a very deep-rooted place, and lasted long enough for Joe to fall asleep on the sofa and for Lisa to have sex with Kate’s brother-in-law in the bathroom. 

What the hell were they arguing about for that long, and could it hint at something that will be revealed later down the track?

Did someone see Lisa having sex in the bathroom?

As the sexual tension between Lisa and Kate’s brother-in-law bubbled over, they forgot to close the bathroom door behind them as they got down to business. 

As they romped, we saw a flicker of someone passing the crack in the door wearing a stripped T-shirt.

While their identity was not revealed, a quick rewind confirmed Kate’s daughter Lucinda was wearing a stripped T-shirt while sat on the stairs as Lisa and Joe arrived – so the question is, did she see her uncle and best friend’s mum cheating with one another?