Khloe Kardashian's Instagram feed has fired up after her ex Tristan Thompson left a very thirsty reply to a picture of her posed in her bra and knickers.

The couple split last year after it emerged had Tristan cheated on Khloe again - this time with close family friend Jordyn Woods.

Khloe, 35, swiftly dumped the basketball star and booted him out of the house they shared with daughter True, one.

After exchanging furious words, the couple have since remained close for their daughter's sake though speculation has been growing the pair have been getting even closer.

And Tristan looked very cosy with his ex as he jumped to reply to a very seductive selfie from the reality star.

Khloe took to the photo sharing site to plug the latest intimate underwear set from her brand Good America, naturally casting herself as the model.

The picture showed Khloe posed in a white crop top and matching high rise knickers to show off her enviable hour glass figure in front of her bathroom mirror.

From his verified account, Tristan wrote back: "Saucy" followed by several flirty emojis - including one of a face drooling with delight.

Khloe appeared to ignore the remark, but her fans didn't and many were not impressed with cheating Tristan's reappearance in her comments.

"Scram!" one ordered.

"He's so desperado! But she knows better," said another.

However, other fans thought the exchange was perfectly acceptable.

"That’s his child’s mom relax people there always gonna be family," said one fan of the two.

"Just get back together already!" another urged.