Re: How to Deal with Older Sister Bully
my sister does similar things, but she has been diagnosed with BPD and other disorders. and she is in the very same situation as your sister.
it may be hard, but bringing up why she tries to make you feel guilty could be productive, talking it out and such. also making clear boundaries, say if she talks to you in a disrespectful or hurtful or threatening way, making it clear that you don't like being treated that way.
but if all else fails or gets worse, sometimes you have to ignore or let those outbursts go because they will stress you out too much.
i hope things will be okay and that you are able to find a solution,
my best wishes,