Things really seem to be heating up these days between Rihanna and her baseball player beau Matt Kemp.

This past weekend, Rih Rih flew back to the states from Berlin to meet Kemp's parents in their hometown of Arizona. She left Germany early where she had just finished up performing at the Echo Awards just so she could make it in time for his annual Ante Up for Autism gala on Saturday; a cause that hits close to home for Kemp, whose younger brother is autistic.

According to E! Kemp's family also attended, and they met Rihanna for the first time.

"Rihanna fit right in as if they all knew each other," said a source. "It was comfortable."

The fundraiser was filled with Vegas-style gaming and cocktails, a silent auction, along with dinner and dancing. The event managed to raise an impressive $170,000 Saturday night with only 150 people in attendance. Talk about big spenders.

Insiders say "Matt was happy she came," to the event and "It was an awesome show of support." Ain't that the truth? Whether you're a celebrity or not, flying across the globe to support your boo is a major deal in our book. We're beginning to like this "non-couple" more and more.