caitlyn jenner, travis barker, kourtney kardashian

Caitlyn didn't purposely skip out on the wedding of the two sisters, she just wasn't on the guestlist. It has been learned.

According to sources close to the couple, Caitlyn never got an invitation for the weekend affair in Portofino, but the couple has no hard feelings towards her. Caitlyn didn't make the cut because she didn't want a very small and intimate ceremony.

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Our sources tell us that Caitlyn and Kourtney don't have a relationship, but they do have a relationship, so they don't need to invite each other.

What did Caitlyn do over the weekend while the rest of the family was celebrating? She was cheering on her newest hobby. Jamie Chadwick won her 5th W Series race in a row.

Caitlyn posted a photo of the driver with the caption "WIN!" after Chapman's victory. Win! Win! She still found plenty of joy even though she didn't have a wedding.

It is worth noting that Caitlyn attended the wedding of Kim andKANye in Italy in May of 2014, a year after she split from Kris.

Caitlyn is going to toast the couple in person at their L.A. wedding celebration.