Multiple sources close to the Kardashians have come out to she light on what's going on behind the scenes. And they say pregnant Khloe Kardashian is distraught.

"She's distraught. Her entire world has been turned upside down. She cried hysterically all night. She begged to come back to LA (she relocated to Ohio of that's where Tristan is based) and tried to find any way to make it work but her doctor wouldn't let her. She just wants to be with her family and leave as soon as possible.

Her Mum Kris Jenner was with Khloe in Ohio when news broke about the cheating so she's getting support from her.
"Everyone is in crisis mode and is trying to be very calm for Khloe. They are all really worried and all of her sisters are dropping everything to be with her. They all keep reassuring her that everything will be OK and to stay calm for the baby."

Her family have also reprotedly asked her to dump Tristan for her sanity
"Khloe will never be able to trust Tristan again or look at him the same way. Her world is shattered. She is in complete disbelief that this is happening. The family absolutely believed it's in Khloe's best interest to end the relationship but will support her either way."