Your first mistake: telling your family that you own bitcoin.
Your second mistake: selling your bitcoin to give money to your sister.
A third mistake you can't do anything about: having a Socialist for a dad, and a sister who is broke.
No shit. I loaned my moron brother $5k to save his house years ago, cashing in a bitcoin at around 3k to do so. He not only never paid me back but got a divorce that's so expensive he's asking everyone for money. Screw em.