The Real Housewives of Beverly Hills star wrote, "The only thing worth stealing is a kiss from your sleeping child................. #PreciousMoments #NoMatterWhatAge @gigihadid."
Gigi, a 20-year-old model who's worked for Victoria's Secret and Maybelline, praised her 51-year-old mother as an inspiration in March for "helping a lot of people through her personal health journey.
"I'm very inspired," she told People. "I think when she finally figures out how to help herself, she'll be able to help a lot of other people."
As RadarOnline.com previously reported, Foster has been outspoken about how her family has uplifted her in her three-year battle with the disease, which has left her in and out of hospitals, on numerous medications, and traveling abroad in seek of a cure.