Laconic / If You Ever Do Anything to Hurt Her...

A relative of a love interest threatens a character not to hurt him/her or there will be repercussions.
Visit unabridged version HERE, and if you do anything to harm it, you will die!

http://tvtropes.org/pmwiki/pmwiki.php/Laconic/IfYouEverDoAnythingToHurtHer