Big Sean's mom exposed how she really feels about her son's serious girlfriend Ariana Grande, and the rapper seems a little embarrassed about it.

Insider Reveals If Big Sean & Ariana Grande Are Engaged 'She Would Say 'Yes' Instantly'

TMZ caught up with Big Sean and his mother at an airport. When asked about her thoughts on Grande, she said, "Oh yeah we just saw her last night."

Big Sean pretty much goes as far as covering up her mouth letting her know she said enough. But that didn't stop his proud mother from giving up the juicy detais.

Big Sean & Ariana Grande Keep Relationship Spicy Amid Distance 'She Loves That Kind Of Thing'

"20,000 people knew he was at the show last night with Ariana. She's fabulous!" she said, referring to a recent Detroit concert in which Grande and Big Sean hit the stage together for a steamy performance.

"Mom loves spilling the beans," Big Sean said.

Check out the adorable video.

Big Sean made an appearance at Grande's Detroit stop of her Honeymoon Tour Saturday. The two performed their single Best Mistake from Grande's latest album. But it wasn't until they rocked out to Right Here that they got intimate in front of thousands of people.

"I love y'all," Big Sean exclaimed. "Make some noise for my girl Ariana Grande, y'all!"

Big Sean's family isn't the only one fond of the relationship. Grande's brother, Frankie (who most fans might remember from Big Brother) recently dished on the rapper.

"He's a great guy. He's extremely normal. She was so wonderful and happy and they looked great together. I was thrilled," he said of their first red carpet appearance, at the Grammy Awards back in February.

Tags: Big Sean Ariana Grande Big Sean Ariana Grande Relationship Big Sean Ariana Grande Together