Gabe Brown of the hit reality TV show "Alaskan Bush People" is now in hot water after an Instagram post on Valentine's Day showed him kissing an unnamed girl -- to the dismay of many fans.

Reports reveal that Gabe's sister, Rain Brown, posted the photo on the microblogging site Instagram on Valentine's Day where she is seen "third wheeling" with her brother and the still unidentified girl.

The comment section instantly blew up with fans alleging the reality TV star of cheating on other rumored girlfriends.

According to comments on Rain's post, Gabe is already engaged to an unnamed girlfriend that he has been together with for seven years.

Aside from infidelity speculations, few comments on the Instagram post indicate that the 28-year Discovery Channel star had flirted with them and left them with "questionable" messages.

In defense of Gabe, Noah Brown, Gabe's younger brother, told fans that if the speculations were true, he himself would know it by now.

The 25-year-old Brown disclosed to fans that his brother Gabe is a "one woman kind of guy."

Meanwhile, Rain told the fuming fans that Gabe is simply not engaged.

A comment from someone claiming to be close to the trio said that the girl in the photo is Rain's "best friend" and that the younger of the Browns introduced them together.

"Alaskan Bush People" made headlines last year after Ami Brown's lung cancer diagnosis. Doctors told the mother of seven that she only had a three percent chance of surviving.

However, early this year, Ami was reported to have been rid of cancer. The matriarch is now focusing on gaining the weight that she lost while undergoing treatment and is now eating more healthily.