Her lips are sealed!

Khloe Kardashian kept her mouth shut when we asked the reality star if she and her on-again/off-again boyfriend French Montana had reconciled. You can try to hide it, Khloe -- but we know the truth!

Wearing an all-black workout ensemble, the 30-year-old hit the gym on Monday morning (looks like she needs to work that body out for French!).

After her gym trip, she stopped at XIV Karats (the same jewelery store Beyonce was browsing in last week!) in Beverly Hills. Maybe she's buying some bling for her rapping honey?

When we asked Khloe about her recent trip to Florida with French -- she declined to confirm their relationship. But we know that the duo has been spending time together again. They returned to LA Sunday and headed straight to Chris Brown and Tyga's concert.

After their romantic beach vacay and their subsequent concert date, it looks like the twosome are very much back on -- even if Khloe is keeping quiet on the subject!