[custom_adv] The 35-year-old ‘Slumber Party’ singer came to support her 23-year-old boyfriend’s sister Faye Asghari who modeled the show! [custom_adv] Sam wrote on Instagram alongside a video of his sister: “My little big sister doing her first show. [custom_adv] ” Designer Michael Costello was so thankful for Britney and Sam showing up that he wrote on Instagram as well: “Thank you Britney Spears and Sam Asgari for sitting front row at the fashion show . [custom_adv] you guys are such sweethearts. We love that you came out to support our show so so so sorry you had to see that previous show that almost made you leave,” [custom_adv] Sam Asghari puts his muscles on display while leaving the grocery store Bristol Farms on Tuesday afternoon (November 5) in Beverly Hills, Calif. [custom_adv] The 25-year-old personal trainer and boyfriend of Britney Spears was spotted with his sister Fay while grabbing lunch at the store. They were spotted leaving together in his car after the meal. [custom_adv] Spears' boyfriend, Sam Asghari, took to Instagram to praise his lady love for doing what is best for herself. Asghari reposted the "Oops, I Did It Again" singer's Instagram, which read, "Fall in love with taking care of yourself. Mind. Body. Spirit." [custom_adv] The model and actor then captioned his post, "It isn’t weakness, It’s a sign of absolute strength, people should only be inspired by this, at least I amstronger." [custom_adv] A source close to the Spears family told ET on Wednesday that the 37-year-old singer is currently in a facility taking time to care for herself because she’s been under tremendous stress over her father, Jamie Spears', current health crisis. [custom_adv] “She has had little communication to the outside world and spends most of her time with the staff and kids," the source claimed. "She's truly isolating herself. She is painfully protective of her children and doesn't trust anyone with them. She worries constantly about them. The children are doing fine. She loves them so much and tries so hard with them."' [custom_adv] "Her father's illness has frightened her," the source shared. "He has always been her savior and her support system and it doesn't seem that he is getting better. She has always trusted her father in every way and is finding it difficult to deal with the possibility of losing him."