The ex-TOWIE star has been inseparable from Geordie Shore's Marnie throughout the current summer series, and they took things to the next level on Monday night (8 August) by sharing a steamy shower together.
Phoning in to Bit On The Side afterwards, Lewis' mum Claire said: "Listen, Marnie is welcome at my house anytime! She's invited for a three-course meal!"
As you'd expect, Claire has been one of Lewis' biggest champions on Twitter, watching everything that's going on in the house. Yes, that means last night's shower scene as well!
After Lewis and Marnie slipped into the shower together and Marnie branded it the most "romantic" experience, the official Big Brother account cheekily tweeted: "Romantic shower? Hmm, we're used to red roses."
Claire replied with a very valid point: "Lewis can't buy roses in there!!! If he could she would be showered in roses by now xx."
Claire phoned into last night's CBBBOTS to support her son ahead of tonight's live eviction show. He's nominated against Stephen Bear, Saira Khan.
Discussing why viewers should vote Lewis to stay, she said: "He's bringing honesty to the house and people sometimes don't like that. He's totally being himself. People who know him, like Ferne McCann from TOWIE who tweeted this, say that what you see on the show is what you see in real life. He's a total gentleman."
CBB continues tonight on Channel 5.