A 68-year-old Sammamish woman accused of killing her husband and son-in-law and severely injuring her daughter after driving her Jeep through her home — with her grandson in her lap — pleaded not guilty Dec. 18 to charges filed by the King County prosecutor.

Carol Sue Fedigan faces two charges of vehicular homicide, one charge of vehicular assault and one charge of reckless endangerment from the May incident. If convicted on all counts, she faces up to 13 years in prison.

According to charging documents, Fedigan had been eating dinner with her family at the lakeside home she shared with her husband when she left to move her new Jeep into the driveway. She took along her infant grandson.

Minutes later, the Jeep plowed through the front of the home, through the dining room and seated family members, out the back and onto the home’s boat deck. The car narrowly avoided falling into the water by becoming stuck on a protective fence. Fedigan’s grandson was uninjured other than an abrasion on his forehead.

Responding police smelled alcohol on Fedigan’s breath and obtained a search warrant for a blood test. Results showed alcohol and sleeping pills in her system, at legally impairing levels.

The King County Court granted a defense motion to lower Fedigan’s bail to $100,000, from $250,000.

A case setting hearing is scheduled for Feb. 5.