Welcome, internet gossipers. We have all likely gone above-and-beyond before for a loved one without expecting anything in return. Perhaps you paid for a good chunk of your child's wedding, made yourself available at the drop of a hat for your sister if she needed last-minute, free babysitting, or used your artistic talents to paint a pet portrait for your cat-obsessed relative free of charge. Sometimes it feels good to do something kind for a family member with no strings attached, but the who…