The Russian musician - who gave birth to their daughter Lucia last November but split with the actor just five months later - doesn't think she fell pregnant too quickly, and wouldn't change a thing about the decisions she's made.
She said: "I don't think I would do anything differently. A child is the most beautiful gift one can have, so I was blessed to have her. She is fabulous, so cute. She's chubby, like a cherub, and very smiley. She takes my demeanour - calm - and looks like Mel - that's little Mel!"
The 40-year-old beauty - who also has a 12-year-old son Alexander with ex-boyfriend Timothy Dalton - admitted she hadn't expected to be a single parent a second time around but would get on with it as best she could.
She told Britain's Hello! magazine: "I didn't plan on being a single parent again. It's a recent, sudden thing for me. I need time to put my thoughts together."
Although the musician insists their separation after three years together was amicable, it has recently been alleged that Mel cheated on her with porn producer Violet Kowal while she was pregnant with their daughter.
Violet claims to have had a three-month fling with the 'Mad Max' star last year, with the reported romps happening at his Malibu home and office in Santa Monica.
The 26-year-old Polish filmmaker told National Enquirer magazine: "Mel's break-up with Oksana doesn't surprise me at all. Clearly, Mel can't commit to just one woman."