Sleepovers aren't only for girlfriends.

Kylie Jenner's mother Kris allows her 17-year-old daughter's older boyfriend to spend the night in their home in Hidden Hills, California, RadarOnline reported. An insider said, "there are many nights that Tyga just crashes at Kylie's house, with Kris' blessing."

"Kris is very liberal with rules for Kylie, and allows her to throw parties all the time at the mansion," the insider added. "Kylie's dad, Bruce, doesn't like Tyga spending the night at the house, but he is really powerless to do anything. Kris and Bruce have fought about it, and he has accused her of being a friend first to Kylie, and not acting like a mother."

Hollywood Life reported that Kylie was spending nights with Tyga at his Calabasas, California, home. An insider said Kylie has complete access to the rapper's home and calls it her "'emergency mansion' in case something is going on at Kris' [Jenner] or Bruce's [Jenner] house." 

The reality star was given her own key and knows "all the security codes needed to get in and out the home." Kylie reportedly "comes and goes as she pleases."

However, the insider claimed Kylie, who has yet to confirm her relationship with Tyga, does not share a room with the rapper, saying, she "has her own room and bathroom there. Her mother is fully aware of the arrangement and supports it and trusts that both Tyga and Kylie are telling the truth that no funny business is going on." 

But not everyone is happy with the "Rack City" rapper's new sleeping arrangement.  A source close to the family claim that Kim Kardashian-West does not want her sister dating Tyga because of his former relationship with Blac Chyna, who he has a two-year-old child with.

"Kylie doesn't want Kim's advice and told her that she is the last person to ever give advice on relationships," the insider added. "Kylie will soon be turning eighteen, and Kris doesn't want to do anything that would cause her to move out sooner. Kris has always wanted to be the cool mom, and isn't concerned Kylie is growing up too fast."

"Kylie's dad, Bruce, doesn't like Tyga spending the night at the house, but he is really powerless to do anything. Kris and Bruce have fought about it, and he has accused her of being a friend first to Kylie, and not acting like a mother."