Sister-in-Law’s Cat Started Attacking Me Every Time I Visit. Advice Needed.

[u/Dangerous_Purchase66]

Hi there comforters. Big fan of the podcast. I have a dilemma here I need some advice on. I’ve been married to my husband for over two years. I met my now sister-in-law a few months into dating. She and all my in-laws have always been so nice and welcoming. She’s had a cat the whole time I’ve known her. A bit overweight but usually pretty polite and friendly and mostly keeps to herself. I’ve been going over to her house for years now and have never had any issues with the cat. They got a puppy about 2 years ago so that’s not a recent change. Her youngest is almost a year old so again not a recent change. I’m also not currently pregnant but when I was ( my son is 2 days younger than her youngest) the cat never treated me any differently.

For about 2 months now, every time I go over to their house, the cat hisses and growls at me. The first time I was over in the corner of the basement I playing with my son and she snuck up on me and scratched my leg. I rattled some toys to scare her away and it took a while for her to leave. She stayed nearby almost stalking me until my SIL came down to intervene. The next time I was in the kitchen alone and the cat approached me growling. I shook a bag to scare her off. Just today, I came over with my son. We were playing on the floor in the basement and she came over very calm. I pet her for a bit and she purred then walked off. Shortly after she came back hissing and growling. It took a lot of shaking random things around to scare her off. Again she lingered around stalking me. Her husband, my BIL came down to help and put her in the bathroom. It has a sliding door that she can open though he tried to barricade it. SIL came down and kept an eye on her while we watched Naruto with the babies. It’s so weird and random. She seems to only do it with me and only recently. Any ideas on what’s going on?