How to lose 10 pounds in secret?

Anonymous
I would like to lose 5-10 pounds without anybody in my family knowing I am trying to. I know they will not support me or help... Is there a certain technique or habits or routine I could do to lose 10 pounds rather quickly? Before the end of summer? And do sit-ups or crunches help to lose belly fat?
How to lose 10 pounds in secret?
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