Fumming WARNING rant alert

My Dad's girlfriend has a 2year old she'd saved a lot of her clothes and things like the cot etc and when I fell pregnant in July she said I could have all her stuff because she knew I was struggling with just buying my house. I knew we'd cope but it was a real help. In September I went my 12week scan and found out I'd had a missed miscarriage. I was devastated. My Dad's girlfriend's sister got pregnant shortly after me. And the first thing she said when she found out I lost the baby she said, "oh so she won't be needing the stuff then I'll have it". I think it upset us all. Today was the first time I'd actually been able to be civil with her and she says, "I don't want to rub it in but..*and shows me a picture of her scan*" WHAT ON EARTH! how I didn't slap her I don't know. Really 😔😔😔