“Ryan’s was that when he goes out, he has to sleep with women.”
But asked if he despised his brother, Rhodri replied: “No, I don’t. I feel sorry for him.
“He’s had the most amazing career but it’s just tarnished and that’s not down to me. It’s down to his own philandering. I was faithful.”
Rhodri was speaking a month before Giggs, 46, was arrested over a bust-up with girlfriend Kate Greville.
The Sun told how police visited his £1.7million home in Worsley, Greater Manchester, on Sunday.
They rowed over flirty messages and Kate’s fears the star had been cheating on her with two women.
Giggs spent the night in a police station before being interviewed and released pending enquiries.
He denies any wrongdoing but is being investigated for actual bodily harm on Kate and common assault on a second woman, believed to be a relative of hers.
The Giggs brothers’ scandal emerged in 2011. While ex-Wales star Ryan was bedding Rhodri’s wife, he was also having a fling with Big Brother star Imogen Thomas.
The scandals shattered his squeaky-clean image and triggered his divorce from wife Stacey.
Dad-of-three Rhodri, who played for Salford City and Torquay United, spent years trying to comprehend his brother’s behaviour but decided to “make humour” about the situation.
He has appeared in cheeky Paddy Power ads about loyalty, and says he has a “sly dig in a jovial way” when he speaks to Natasha, now 38.
During his time at United, Giggs won the Premier League, FA Cup, League Cup, Community Shield, Champions League and FIFA Club World Cup.
He was a member of the Great Britain squad that got to the quarter-finals in the football event of the London 2012 Olympic games.
