Los Angeles, California - After almost 12 years, actor Reese Witherspoon and her husband Jim Toth announced their divorce nearly two weeks ago. But what really broke up their marriage? An insider may have revealed things got a bit lackluster in the bedroom.

If you're as successful a movie star as Reese Witherspoon, you have to work hard for it. But did the actor's love life really fall by the wayside because of her heavy workload?

An alleged friend of the ex-couple revealed to Bild that the mother of three and her ex-husband are said to have lived together like siblings, as the romance between the pair had vanished.

To keep their love life going, Reese and Jim are said to have arranged a weekly date night in the beginning. But over time, the dates stopped happening partially thanks to the 47-year-old star's busy business schedule that included 80-hour work weeks.

Taylor Swift Taylor Swift lends music to first trailer of It Ends With Us movie adaptation

"Reese and Jim have lived together more like brother and sister in recent years," the insider told Bild.

Despite their separation, Witherspoon and Toth continue to strive for a good relationship with each other and want to take care of their son together with the help of shared custody.

In addition to ten-year-old Tennessee, the successful actor also has two children – Ava (23) and Deacon (19) – with her first husband and Ice Cold Angels co-star Ryan Phillippe, whom she was married to from 1999 to 2008.

However, despite many rumors about Witherspoon linking up with retired NFL great Tom Brady, the star denied the allegations to Page Six.

Witherspoon seems to be concentrating on one man in her life for the time being: her son.