Thank you Elphame 
I understand it now, looking forward to giving it a try!
Hopefully I won’t be ridiculed and I’m completely aware of how silly some of this sounds (and how long it is) but here goes:
My gran always said she’d get a feeling when she was around people with darkness inside of them, like their energies clashed and it would leave her drained. She never made a huge deal of it though. My aunt (her daughter) had been seeing a man for a few months and appeared smitten with him. She brought him to my gran’s and without him even speaking my gran up and left - which wasn’t easy for a lady of her age 
The rest of the family thought he was a really nice chap, he was handsome, charming etc.
She was then ill for a few days after meeting him, she had flu like symptoms and stuck in bed. She was also waking up with nose bleeds on some nights which she blamed on her nightmares being too vivid. She eventually said that she kept dreaming of my aunt’s new chap doing awful things. One night she was particularly disturbed by a dream and so to calm her down my mum called my aunt but she couldn’t get through. She lived too far away for any of our household to visit and so in the morning they asked another relative to stop by her house.
When he got there he found my aunt dead at the bottom of the stairs. She was later found to have taken an overdose so it was suspected she had committed suicide.
While all of this was going on, Gran was pushing for the police to find the boyfriend. She also insisted that my aunt had written to her. There were no letters or suicide note though and this was the first we’d heard about it. Gran was getting increasingly frustrated with everyone and became reclusive plus she started drinking whisky which was uncharacteristic for her.
Roll on a few weeks and whilst clearing out the aunt’s flat, a family member came across a diary. In it, my aunt had recorded heartbreaking details of her boyfriend abusing her. Most notably was him forcing her to swallow sleeping tablets. The days also coincided with gran’s dreams. This was then given to the police but gran said it was too late.
They eventually returned to us and said the boyfriend had died in a car crash. It was an odd accident as he’d seemingly driven straight off the road but he was over the limit and they found whisky bottles in the car.
My sister and I have always disagreed about what happened. She’d say it was all just awful luck in terrible circumstances. But I always believed my gran knew what was happening which was why she was so disturbed at the time. When it was decided my aunt had committed suicide, most accepted it but gran became much darker and withdrawn. I remember her not letting me watch her do her normal (witchy) routines and she wouldn’t explain anything to me. I’m not entirely sure that she somehow caused his death and everyone put it down to karma but I suppose they essentially involve the same thing - the universe’s reactionary energy.
Gosh that’s very long and I sound bonkers. One of my other stories is much less dark but probably more bonkers. I suffered with alopecia as a child and cried about it to my gran. She did some sort of healing on me and my hair grew and grew. I’ve had a huge mane ever since