Kris Jenner had her first "date night" since splitting with Bruce Jenner on Tuesday ... with "Bachelor" stud Ben Flajnik!

The "Keeping Up with the Kardashians" star posted a photo with the fellow reality star on her Instagram last night, along with the message "Date night with @benflajnik and @Lizheinlein."

The trio were spotted at the Beyonce concert at the Staples Center.

The sighting comes after rumors the two have been hooking up since Kris split from her husband of 12 years.

Both Ben and Kris have denied the reports so far, with Flajnik saying "We are not dating, we're just working on a couple of projects together, so that's why we've been seen a lot as of late."

Sounds to us like Jenner is soaking up the attention on this one -- and intentionally fanning the flames with stunts like this.

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