Your account is your responsibility and you should not have given your daughter your password. By giving her your password you have given her permission to use your account.
You have to either pay for the item, or end up with a non payment strike on your account. If you already have a strike, or get another you will be banned from buying from 95% of sellers.
This wastes the sellers time and costs them money in fees. You should change your password, and keep your children off your account.
