Long story but really stuck on what to do. 5 years ago my sister lost her daughter as she was stillborn, and she has been struggling ever since. A big trigger point for her now is dogs as when her daughter was buried , a woman kept letting her dog run over her daughters grave and didn’t respect that my sister needed that space to grieve. I am worried as she is becoming increasingly isolated and aggressive. Today I visited her, her partner and her 4 kids and went to the park. The play area had a sign that said no dogs, but there was a lady with a dog on a lead and her kids were playing in the park. I was with my two nieces when I noticed that my sister was shouting at the woman and becoming increasingly aggressive , and swearing at the woman. She then stormed off; leaving me with the kids. When we got home, I told her I was concerned and felt she needed some support to help manage her emotions, she screamed at me and threw a mug in my face. I tried to talk to her partner and my parents about my concerns, they said that I need to just let her grieve and that I don’t understand because I don’t have kids ( sensitive subject for me as started trying to conceive a few months ago ) . I explained that seeing the hurt on the kids faces was horrible and I’m concerned that her behaviour will lead to an awful situation and I think she needs some professional help; I feel they are enabling and validating her aggressive behaviour. They are now angry with me and feel I am meddling. I am so worried for the mental health of her and her kids and am in awful situation of wanting to help but no one wanting to listen. Was I in the wrong for these opinions? And is it best to let these things slide?