12:40 PM PT -- Law enforcement sources tell us Christine Quinn was offered an emergency protective order against Christian Dumontet. Sources with direct knowledge tell us she accepted this protective order, which will be in effect for 7 days.

11:38 AM PT -- TMZ has confirmed that Christine and Christian's 2-year-old son was, in fact, transported to the hospital Tuesday via ambulance -- and we're told Christine went with him.

Sources with direct knowledge tell us that an ambulance arrived on the scene to treat the child -- and in the end, we're told first responders thought it'd be best if the kid went to the hospital ... so they took him.

Christine Quinn's husband was arrested this week -- and the charge he was booked for is incredibly serious ... TMZ has learned.

Law enforcement sources tells us Christian Dumontet was taken into custody Tuesday afternoon near his L.A.-area home -- where he was seen wearing a bathrobe -- and hauled away by cops, who put him in a cruiser and took him to jail.

We're told a call for a domestic incident is what spurred officers to show up. In terms of what allegedly happened -- our sources tell us there was a verbal argument between Christian and Christine ... and Christine told cops Christian threw a bag with glass in it at her.

We're told the bag missed Christine and it actually struck their young child, a 2-year-old, and at this point ... our sources say the call to 911 was then placed. We're told that an ambulance arrived, but the toddler didn't need to be transported ... getting treated at the scene.

We're told Dumontet was booked for assault with a deadly weapon, a felony. As of this writing, he appears to still be behind bars on $30,000 bail. His arrest was first posted by Page Six.

She and Christian have been married since 2019 -- and he's also been featured on "Selling Sunset" ... although, his involvement has been minimal as he's mostly behind the scenes. Their December wedding was well-documented on the show at the time.

In terms of his background, Christian comes from the tech world ... and fancies himself as an entrepreneur these days. He and CQ share one kid together ... a son also named Christian.

On its face ... there was never any real drama between them that was captured on camera.

We've reached out to Christine's camp for comment ... so far, no word back.