AceShowbiz - Foo Fighters frontman Dave Grohl is facing immense pressure to prove his commitment to his marriage with Jordyn Blum after revealing that he fathered a child outside of their relationship.

On September 10, Grohl shocked the world by announcing on Instagram, "I've recently become the father of a new baby daughter, born outside of my marriage." He expressed his intention to be a supportive parent and apologized, "I love my wife and my children, and I am doing everything I can to regain their trust and earn their forgiveness."

Sources close to the couple reveal that Grohl has been "bending over backwards" to turn their marriage around while the situation has left him feeling "barking mad" and questioning whether he can endure the ongoing scrutiny.

"He's gone from being a rock god to a scumbag overnight," an insider exclusively told In Touch. "It's changed the dynamic and he hates it."

In the weeks since Grohl's confession, both he and Jordyn have been spotted without their wedding rings. Jordyn has been seen meeting with pals, including her tennis coach and Fall Out Boy's Pete Wentz. Grohl, too, was seen leaving a friend's house without his ring.

Sources say that Grohl is offering constant apologies, providing phone records, and attending therapy in an attempt to rebuild trust. However, he is frustrated that the process of forgiveness may take considerable time.

An insider reveals that Jordyn has given Grohl an ultimatum: figure it out or face the consequences. Grohl's hope lies in focusing on Jordyn's needs and proving his commitment to her.

"Revealing [his affair and baby] was his last-ditch effort to save the marriage, because Jordyn knew about it well before the world found out," an insider said. "He would rather remain married."