If you felt blindsided by Heidi Montag’s marathon plastic surgery binge, think about how her family  and friends must feel. Heidi kept her plans from everyone, including her mother.

Nine weeks and four breast sizes later…Heidi’s mom is said to be “Horrified”.

“I still can’t believe I’m 23 and mom is reacting this way,” Montag tells PEOPLE. “I’m nervous to go home and face her – especially with cameras rolling.”

A source close to the family tells PEOPLE that Egelhoff “is horrified and having a total breakdown. She can’t wait to confront Heidi when she goes home.”

Montag’s mom, who lives in Colorado where the reality star grew up, will get her wish soon. “Heidi is planning to head back to her small town of Crested Butte very soon,” says the source.

Don’t worry…we’ll get to see all the drama play out next season on the MTV hit, as cameras will catch every moment.