$129,000/month from Kevin Costner. in insufficient child support, Christine wants $175,000

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Kevin Costner gets off easy paying $129,000 a month in child support...according to Christine Baumgartner who wants that number to increase to ensure their children continue to live large when they're with them her.

Christine filed documents, obtained by TMZ, asking the court to reconsider the amount of child support Kevin is paying due to 2 factors: 1. ensuring the children enjoy the same lifestyle with both parents, and 2. what she learned about how much money Kevin made.

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She explains this in the documentation, explaining that their 4 children live with their father in a beach resort that is worth between $65 and $95 million...and that they also take private flights for vacations. luxury with Kevin.

You will recall, Kevin flew the kids to Aspen last month, right after Christine welcomed them to Hawaii. She says Kevin must pay child support sufficient "so that the children can enjoy a comparable vacation when they are with her. This is true even if paying child support also improves Christine's lifestyle." p>

Christine says it's just the standard required by the California family code. On that basis alone, she says the $129,000/month won't be enough, and she estimates $175,057/month instead.