So my sister has IBS and we think she may have undiagnosed endometriosis. I feel as though she uses this as an excuse to get out of chores and to treat everyone like shit. over the past few years she has become more and more stubborn. It all started when I told her to make sure she turns radiator off as she left it on one day and left the house, during this conversation she tells me to shutup and I tell her not to speak to me like that. She ignored me for 3/4 months straight after this and didn't do any housework at all as some sort of rebellion I'm guessing. We made up after this, which meant I apologised even though I did nothing wrong but I just hate the tension so I put it behind me.
However, ever since this instance I think she has liked how she got away with not pitching in with housework. She moved out for uni for a while and things at home were nice and peaceful for all of us. She comes back and honestly it's been hell for everyone. She continues to refuse to do any housework at all, even me asking her to pick up her OWN things is an issue and she will ignore me for a couple of days. She always complains there is nothing to eat at home when we have the luxury of being able to decide what we get to eat everyday. This leads to my mum feeling pressured and feeling like she has to cook for her when she comes back from a hard day at work(bearing in mind my mum works as a cleaner). The other day my mum cooked 3 dishes for her which took a lot of time and effort and what does my sister reply with? "There's nothing to eat" and she states that the food my mum makes gives her heartburn, yet an hour later she orders a takeaway?. Following this she ignores my mum for 3 days. I feel like she has become way too spoilt and it angers me that she gets away with so much and it's just becoming ridiculous now.
She always makes excuses as soon as it's time to help with cleaning, and makes me feel like a villain when i only ask to HELP or just pick up after HERSELF. It's always "I'm ill", yet she's perfectly okay when we go on a 3 hour shopping spree or when she wants to go see her boyfriend.
Speaking of shopping, she is a student right now, and I have recently graduated. She has more money than me and my mum put together yet whenever we go out it's always my mum paying for whatever she wants. My mum feels like she has to get her things because my sister is "ill" and says she doesn't want my sister saying that she does nothing for her. Which she does anyway. Me and my sister were having a conversation once and she mentioned being children. I told her we are in our 20s we can pay for everything ourselves. She just continues to be ungreatful, talk to everyone like shit. My mum rants to me saying she's upset about how she treats her and it's gotten to the point where I don't want to hear it. She needs to stop letting my sister walk all over her. We all Do to be honest. It is really making me frustrated and I feel like I have alot of built up anger at this point. I just feel helpless, I ask nicely, still get ignored or told I'm heartless and that I don't care about her illness. She always makes us feel like we don't do anything for her yet we.all try our best. I think at this point she's just manipulating everyone with her illness. I think that I'm being too harsh sometimes but there are people who are in way more serious conditions that still manage to at least pick up after themselves.