Excuses are different from reasons. Reasons for a behavior do not excuse the behavior. Reasons do help you figure a realistic way of solving problems. Example: the reason the cats are using your laundry basket of clean clothes for a litter box is that their own litter box is full. No excuse, just a reason. Solution: don't beat the cats, scold them or get rid of them, simply clean the litter box and make sure there is no basket of clean clothes to use as a substitute.
There are reasons the girl is hanging out at the pool, not telling her parents where she is all day and not cleaning her room. Find out the reasons and find realistic, workable solutions. This may take some time, patience and effort. It also will help prepare her for the adult world. Nagging and punishing, with no good result, teaches her nothing but that her parents are ineffective at parenting. It can also help her fufill the expectation that she is "lazy" and turn prophetic in that your worse fears for her as an adult will come true.