[JohnnyBB]

LOVE-RAT Rex Newmark cheated on teenage girlfriend Nicole with a pretty American blonde, The Sun can reveal.
The playboy, 24, had a steamy romance with Ashley Abbott, 21, after they met in a street in Miami, Florida.

They spent nights romping at a posh hotel — and were set to get serious after Rex offered her a summer job in his family’s restaurant in London’s Notting Hill.

But Rex, who told trusting Ashley he was single, stopped contacting her shortly before entering the house.

She fumed last night: “Rex is a jerk. I trusted him and he betrayed me. I should have known he had a girlfriend.

“I hope he seeks professional help for his deceitful, womanising behaviour. He has no conscience.”

Amazingly, Ashley contacted Nicole — who entered the house on Day 58 — on MySpace after seeing sexy snaps of her on Rex’s Facebook account.

She said: “She asked me, ‘Is he cheating on me?’ I said, ‘What do you mean? The question is more whether Rex is cheating on ME’.”

She said Rex dismissed Nicole, 19 — his girlfriend of a year — as “young, crazy and obsessive” and denied they were dating despite the Facebook pictures.

She claimed chef Rex deleted the snaps after she told him to.

Ashley said she first met Rex in January when he stopped her in the street in Miami. He was with a pal nicknamed Richie Rich.

They got together a couple more times before he returned home. He went back to Miami with his family in March and called her up. The spark between them ignited and their relationship became “intimate”.

They spent steamy nights at the prestigious Delano Hotel in Miami’s South Beach.

Student Ashley said: “We had the most amazing week. It was like a honeymoon.”

Rex bombarded her with loved-up texts when back home again but they stopped in June when he entered the house.

She only found out he was on Big Brother after Richie left her a message on his Facebook page.

She said: “I was really mad. I guess Rex just wanted to have his cake and eat it. He made a fool out of me and it’s embarrassing. I was in love with him.”

Nicole, meanwhile, has had a love-hate relationship with Rex in the house. She confronted him over a story in The Sun about his having sex with a stripper — but he yelled at her: “Why did you come in here if you doubt me?”

Yesterday the couple, who had been split in Heaven and Hell, were reunited — but it was hardly love as Rex immediately asked Nicole to attack his acne.