Kourtney Kardashian has reportedly hired a therapist for her five-year-old son, Mason.

The 36-year-old star, who also has daughter Penelope, three, and son Reign, eight months, with ex-boyfriend Scott Disick, has reportedly taken her eldest child to therapy with her a couple of times in order to help him understand her split from his father.

A source close to the 'Keeping Up with the Kardashians' beauty said: ''Mason is very close to his dad and keeps asking why he isn't living with them anymore. He was an only child for two years, and Scott was around a lot more for him.''

But Kourtney is ''convinced it'll be good for Mason'' and ''is already seeing the benefits.''

The insider added to OK! magazine: ''A therapist can explain things to him and help him learn to express himself. [Scott's] barely been there since Reign was born and Penelope has always been very close to Kourtney.

''[Mason's] a sensitive little boy. She says Scott has done enough damage.''

The reality TV star dumped Scott, 32, after nine years of dating last month after he was photographed cosying up to an ex-girlfriend while on holiday in the South of France.