Sources tell Us Weekly Sandera lives with the 84-year-old actor in the house he once shared with estranged wife Dina.
"Clint's kids have all met Christina and like [her]," the insider said, adding that the "kids all say she is 'normal.'"
Sandera reportedly works at Eastwood's Mission Ranch Hotel in Carmel, Calif.
Eastwood and his wife split in August of 2013 after 17 years of marriage. The couple cited irreconcilable differences as their reason to separate in divorce documents. After their breakup Eastwood and Dina reportedly went on to date ex-couple Erica Tomlinson-Fisher and Scott Fisher respectively.
"Erica Tomlinson-Fischer now seems to be gone. She hasn't been around in awhile," a source said of the actor's fling. "He is with Christina and happy."