They added that they are devastated that she was one of the 12 victims killed at college night at the Borderline Bar & Grill in Thousand Oaks on Wednesday night by gunman Ian David Long, an ex-Marine suffering from PTSD who was also found dead inside the bar.
The pair were on social media in the hours after the shooting trying to located Housley, a student a Pepperdine University.
Alaina, the niece of Mowry-Housley's husband, former Fox News correspondent Adam Housley, had not been seen or heard from since.
Adam Housely indicated that he has a terrible feeling in his stomach because Alaina Housley's Apple watch and iPhone puts her location at the nightclub, but they have yet to hear from her, the Los Angeles Times reports.
Adam told The Times that his gut "is saying she's inside the bar, dead", but he later tweeted that he is "staying positive and praying and hoping and wishing there was more I could do". "I'm hoping I'm wrong", he said.
Jason Coffman said his son Cody Coffman, 22, was among those killed at the country bar on Wednesday night in Thousand Oaks, Calif.
The Times reported that Housley's Apple Watch and iPhone still showed her location at the bar.
Tamera responded on Twitter to one classmate, who wrote: "My suitemate is still missing, she is wearing denim shorts, a blue flannel and sneakers, pls let me know if you know anything #Borderline".
The Real host Tamera Mowry has revealed the devastating news that her niece Alaina Housley died in the California bar shooting.
Housley tweeted about his niece early Thursday morning, asking his followers for prayers.
The Sister, Sister actress said: "Ashley this is her aunt Tamera Mowry Housley". Please pray. I am numb.
Tamera Mowry and husband Adam Housley. "Alaina Housely, we are praying". Ventura County Sheriff Geoff Dean said an investigation is ongoing, and it is unclear what motivated the attack.