Tally,
If you can...move outa that nest of family viper's. Sounds like your sister's may be cause for further violence. As the ole Judge R used to say 'go west young man'.
I know you feel better (so do I) after getting that off your chest. At the very least, it should put all the imagination and speculation to rest..You Know.
Your writing indicates a strong will and lots of courage. More power to you, you obviously decided taking the 'poor me' attitude was no answer.
The future must look like a 'paradise' compared to what you have just been through!
Enjoy the rest of your life.
Danny