Tyga reportedly believes his ex-fiancée Blac Chyna is ''jealous'' of his relationship with Kylie Jenner.

The 'Ayo' hitmaker - who is currently romancing the 'Keeping Up With The Kardashians' star - has had his relationship rocked by allegations made by his former fiancée that he wants to get back with her.

A source said: ''Tyga feels Blac Chyna is really jealous and frankly wants to spoil every bit of happiness he has. ''Since they've broken up, she's been bitter. He feels like she's filled with anger and doesn't want to him happy unless it's with her.''

Last week, Blac posted, what she claims, is screenshots of Tyga's messages to her, begging for the pair to rekindle their relationship for the sake of their two-year-old son, King Cairo, something which is said to have ''stressed'' Kylie.

Another insider added to HollywoodLife.com: ''This has been the most stressful week of Kylie's entire life! She's being strong and supportive to her loving and adorable father as he's having the moment of his life. ''Meanwhile, her personal life is s**t because she's being attacked by Tyga's crazy ex and now feels he's lying to her and still has feelings for [Blac].''