Her sister is struggling to have a baby and now Kourtney Kardashian is offering to be a surrogate for Khloe and her husband Lamar Odom.

The 33-year-old makes the touching offer in the upcoming episode of Kourtney & Kim Take Miami, which airs on E! on Sunday.

The generous gesture comes after – earlier in the show – Khloe tells stepbrother Brandon Jenner and his wife Leah Felder about her fertility problems.

Hearing this Kourtney speaks to her boyfriend Scott Disick and consults a doctor to see if she could help her sister and brother-in-law have the child they so desperately want.

The mom-of-two tells the camera: “Now that I know I’m a good candidate and that Scott is supportive, I will be the oven for her bun if she shall need it.”

She then tells her sister: “I was overhearing you talking to Brandon and Leah.