Caitlyn Jenneris carrying out her work commitments ahead of sonBrody Jenner‘s wedding.

Caitlyn posed for photos at an amfAR event in Austria on Friday, when a Life Ball plane flew through the European country to raise money for the organization’s research into finding a cure for AIDS. The appearance comes as a source told PEOPLE she isunable to join Brody in Indonesia for his wedding.

The Hillsalum, 34, is set to tie the knot with his longtimefiancéeKaitlynn Carterin Nihi Sumba Island any day now. A source close to the family previously told PEOPLE that Caitlyn, 68, “has work commitments that have been set up for months and couldn’t be changed in the end.”

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EpicRiders Welcome Life Ball Plane In Salzburg - Life Ball 2018

Nevertheless, the source said “everything is good” between the two, adding that Caitlyn “will be throwing a big party for them when the newlyweds return to town.”

Caitlyn, who shares Brody and his brotherBrandon, 36, with ex-wifeLinda Thompson, has been involved in the couple’s past wedding festivities, celebrating her future daughter-in-law in April when she attended herbridal showerat the Santa Anita Park racetrack in Los Angeles.

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“Went to my first bridal shower,” Caitlyn captioned a photo of her and Carter, 29. “I had so much fun! PS so much better than Bachelor parties!”

“I’m so happy you were there!!!” Carter commented on the post. “It meant a lot to me!!”

Brody previously told PEOPLE that his famous sistersKendall Jenner, 22, andKylie Jenner, 20,also won’t make it to the festivities.

“My two little sisters, we never even heard from them,” Brody said. “They never even RSVP’d, I don’t think.”

“We sent them an invite but we just never heard anything back,” he added. “Well, they’ll be missed. I would have loved to have had them there.”

In February, Brody revealed it’s been “a couple years” since he last spent time with Kylie, who gave birth to her first child, daughterStormi, that same month.

source: people.com