Dakota Johnson opened up about her relationship with Chris Martin and Gwyneth Paltrow’s kid

Dakota Johnson and Coldplay lead singer Chris Martin aren't legally married, but after seven years together,  

 Johnson is the de facto stepmother to his two children with ex Gwyneth Paltrow, Apple (19) and Moses (17). And she appears to enjoy it.

In a recent interview, Johnson casually referred to Moses as "my stepson," prompting the journalist to inquire how she enjoys being a stepmother.

"I love those kids like my life depends on it," Johnson explained to Bustle. "With all my heart."

Dakota Johnson grew up in a "blended" home; her mother, Melanie Griffith, had a son with ex Steven Bauer before Dakota was born,

 then later welcomed another daughter with Johnson's then-stepfather, Antonio Banderas

Her father, Don Johnson, also has four additional children from previous marriages.

"I have four brothers and two sisters, and my two sisters are not blood-related to each other,

but they are sisters and they call each other sisters and they are always together," she went on to say. "My two oldest brothers are not blood brothers. And they're brothers.

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