But Thiebaud has brought out her adventurous side and the couple have gone water-skiing, sky-diving and for camel rides during trips around the world.
In a video posting on her website, Shania shared with fans that her lover surprised her during a trip to the Swiss Alps with a picnic.
Shania and her ex-husband share custody of their son Eja, nine, and the Thiebaud's have a daughter, also nine.
The former musical couple finalised their divorce in June.'Shania is cordial with Mutt for the sake of Eja.
Shania and her ex-husband collaborated musically and he produced her 1997 hit album Come On Over which is the top-selling female studio album in history.
Lange, who produced hits for bands like Def Leppard, AC/DC and Maroon five, was said to be a recluse and when the couple moved to Switzerland in 2000, they reportedly would go weeks on their estate without seeing anyone from the outside world.
Shania wrote on her website of Thiebaud last year: 'We leaned on one another through the ups and downs, taking turns holding each other.
We've become closer and and stronger through it all'.
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But when the country singer's marriage imploded two years ago with rumours of an affair between her husband and Marie-Anne, Shania turned to Thiebaud for comfort .
He was also suffering from the devastating split from his wife.
The You're Still The One singer hasn't recorded any new music in a while but she has a lot to look forward to in the coming year.