Kylie Jenner is spending a little downtime with Tyga after her over-the-top 18th birthday bash Sunday night. The "Keeping Up with the Kardashians" star celebrated her big day in a major way with a huge party in West Hollywood during which she was surrounded by her famous family -- sans Rob Kardashian -- and her closest friends.

The birthday celebration continued Tuesday as she loaded up a private jet, which she snapped a photo of a posted on Instagram, and took to the skies. She captioned the photo "gone," but did not include where she was off to. According to Us Weekly, Kylie was headed to Mexico with her rumored boyfriend Tyga to soak up a little sun.

The publication reports that Tyga, 25, along with Kylie's family, have made sure to "spoil her" during the last few days. The "Hookah" rapper reportedly spent the night of Kylie's birthday making sure she was happy -- he is said to have helped her navigate the crowded bar, taken several photos for her and done whatever else she needed. According to Us, Kylie took notice of the special treatment, which left her feeling like royalty. 

"He was a very doting boyfriend," a source told Us. "He was taking her photos for her, leading her around the bar. The family was really spoiling Kylie. You can tell she felt like a princess."

In addition to treating Jenner to a spectacular night, Tyga also got her a pretty spectacular gift. The father of one is said to have gifted his girl a brand new white Ferrari 482 Italia. The car is believed to cost somewhere in the neighborhood of $320,000. Photos of Kylie receiving her surprise gift suggest she was beyond thrilled.