Finding out, typically when one or more of the parties are in a drunken stupor, that a step-sister has had a secret crush on you for some time. Typically the lush involved uses words like "probe" and "hot" as they slur out their heretofore private lust. The recipient of these unwanted advances struggles to escape the ranting, slathering monologue. Future gatherings and holidays can be particularly awkward, especially since other family members (siblings) who witnessed the horrific event typically know what the drunken strumpet confessed to...even though she may not remember.

When you eat dirt for the first time and leave your family to build a shack in the woods