Khloé Kardashian ''wasn't trying'' to get pregnant with Lamar Odom.

The 'Keeping up with the Kardashians' star underwent a much publicised struggle to conceive with her estranged husband, but now her sister, Kim, claims she never felt ready for a baby with the basketball star.

Kim - who has seven-month-old daughter, North West - told talk show host Jimmy Kimmel: ''For so long, everyone in our family was feeling really sad for Khloé [and] thinking that she wasn't getting pregnant and everyone around her was.

''She was not showing up to these doctors' appointments behind our back on purpose and doing everything on purpose [to not get pregnant]. She knew that it wasn't right. She knew that she wasn't ready.''

Khloe, 29, had tried to make her marriage with Lamar work before finally filing for divorce in December last year amid claims of him cheating and using drugs.

Meanwhile, Kim, also confirmed she and fiance Kanye West plan on marrying in Paris, France this summer, calling it their ''second home''.

She said: ''We will be getting married this summer, hopefully, in Paris. We love it there.

''We spend so much time there, we have an apartment there. We really love it.''

Speaking about her wedding, she added: ''I'm not telling you where or the date, but I think it's kind of obvious it's in Paris.''