“Stimulated” rapper Tyga is shocked that his baby mama Blac Chyna was arrested over possession of drugs last week, and is preparing his legal arguments to get custody over his three year-old so King Cairo following the arrest, TMZ reported. Chyna is currently in a relationship with Rob Kardashian, much to the dislike of the latter’s family and Tyga’s 18 year-old girlfriend Kylie Jenner.

Sources close to Tyga told TMZ that the rapper is concerned over the well being of Cairo amid the alcohol and drug problems faced by Chyna. The report said that he has filed legal documents to change the custody arrangement where he suggests that he is more responsible than Chyna, who was arrested last week for public intoxication from Austin, Texas. It was also believed that Kardashia drove all the way to Austin to pick Chyna up from jail. In the documents Tyga has reportedly asked for Cairo to stay with him and allow visitation for Chyna on weekends.

The TMZ report also said that the “Rack City” rapper saw the video of Kardashian playing with Cairo and he does not have any problems with the relationship between Chyna’s boyfriend and his son.

Despite the opposition to their relationship from Jenner and his family, Chyna and Kardashian are said to be happily living together. However, a report earlier this week said that Chyna’s mother Tokyo Toni suggested that Chyna’s arrest may have been orchestrated by the Kardashian family.

Meanwhile, another report by TMZ, earlier this week, said that Kardashian's family thinks that Chyna may be responsible for the increased possibility of him relapsing on drugs again. The TMZ report said that Kardashian has started calling his old party friends to get hands on drugs.

Tyga’s relationship with Jenner has also been bogged down by cheating allegations but a report by Hollywood Life said, that she is putting up with all the rumors because she feels she cannot live without Tyga.

“Kylie’s family is trying to get her to see how unhealthy her relationship is with Tyga, but she won’t listen. She feels like Tyga is her soulmate and she can’t live without him. That’s why she keeps putting up with all the BS. It’s not like she’s doing this to herself — Tyga is playing her like a violin. He knows exactly what to do to get back in her good graces when he has messed up,” a source told Hollywood Life, adding: “He comes on so strong whenever he’s in the doghouse. He always buys her tons of presents — everything from shoes to jewelry to stuffed animals — but more than that, he gives her all of his attention. He’ll even break down crying, telling her how much he loves her and can’t live without her. Seeing him cry makes Kylie melt.”