Things are seemingly getting serious between alleged couple Kylie Jenner and rapper Tyga, as they are reportedly discussing marriage.

The "Keeping Up with the Kardashian" star was spotted at LAX airport on Thursday, rocking a diamond band on her ring finger. The "Ayo" rapper was also getting off the same flight as her. Check out the suspected engagement ring here.

Amid their engagement rumors, the couple is supposedly discussing wedding plans already, according to RadarOnline.com.

"Kylie and Tyga are discussing marriage!" an insider revealed. "Kylie has asked her sisters what they think of getting married at a young age, because it is something that she'd been talking about with him."

The insider also claimed that the 17 year old's sisters have no choice but to be supportive of the young pair tying knots, since "they cannot tell her that it is wrong because they were all monogamously coupled at extremely young ages. Those girls do not like to be without a man and if Kylie wants to marry Tyga, so be it."

Moreover, the Kardashian/Jenner sisters would rather see the teenager settle down with T-Raww than "hopping from guy to guy and getting her heart broken like they have all had to experience."

Meanwhile, HollywoodLife.com reported Tyga had a crush on Kendall Jenner before dating Kylie.

"What Kylie doesn't know is that Tyga was totally crushing on Kendall first," a source alleged. "When he first met the family, Kylie was just an awkward kid. But Kendall never had an awkward phase. She was gorgeous and older and Tyga definitely thought she was hot."

The model and the "Rack City" hitmaker did not work out because "the timing wasn't right but Tyga was definitely interested in Kendall first. If things had worked differently, he would be Kendall not Kylie."