Kelly Noble was at the Skegness resort with her three children and her step daughter when the incident happened.
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"After about 10 minutes, the lifeguard came up to me and asked if they were all my children," she told the Metro.
"He said he was going to have to ask us to leave as their policy is to only have two children to one adult.
"I was really upset and so were the children – I practically had to pull them out of there kicking and screaming."
The trip to Butlins was supposed to be a special treat for Michelle's 14-year-old son Lewis, who is autistic.
It had been arranged through the charity Family Funds, which supports families with disabled children.
A spokesperson for Butlins told the newspaper: "When guests book with us, our phone advisors make them aware of our policies regarding child supervision in our pools and fairgrounds.
"Our policy in our pools, which would mirror those of other public pools, is that every two children aged eight years old and under must be accompanied by at least one adult."
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