Khloé Kardashian Odom & Lamar Odom Look 'So Happy Together' at Kanye West Show
updated 10/29/2013 AT 12:10 PM EDT
•originally published 10/29/2013 AT 10:00 AM EDT
On Monday, the Kardashian family showed their support for Kim Kardashian's fiancé at his Staples Center show in Los Angeles – and Odom made an appearance.
"Lamar walked into the arena to huge cheers," an onlooker tells PEOPLE. "He came in with Khloé, Kris [Jenner], and the whole crew, Kim included."
The source adds, "Lamar sat next to Khloé in the VIP section. He was smiling and talking to her. They seemed so happy to be out together and both said 'hi' to friends around them."
But Khloé wasn't the only one thrilled to be out with her husband. "[Lamar] got up at one point and hugged Kris, who embraced him with open arms and a big smile."
After the embrace, Odom – who was wearing a black T-shirt and gold chains – made his rounds in the VIP circle, fist bumping with his friends. He then sat back down with Khloé, "talking and smiling as Khloé played with her hair. Lamar's gaze was fixed on her. They were in conversation like two old friends catching up. They seemed to have a lot to say," the source says.
Another insider says that Odom, whose recently sought treatment to deal with drug and alcohol issues, appeared "totally sober and completely normal" as he enjoyed the evening.
"The family is supporting his recovery so they wanted to invite him [to the show]. But he and Khloé aren't back together," the insider adds.
– Raha Lewis