Man, do we all have the same sister, because a lot of yours sounds like mine!

She's 36, with a now 17 year old kiddo, and her choice in men is....interesting, to say the least. She unfortunately always falls for the big, burly country type guy; not
quiiiite the kind you see in profiled pictures wearing sunglasses and hats in their trucks, but not too far off. A lot of them have been in the army in the past and either have some lingering mental issues or are just total schmucks. Half of them have been passively homophobic to me and my boyfriend. But she loves them and makes every excuse for them. I see how shitty they are, my poor Mom (who lives in the same house and, because of her physical disabilities, relies on my sister for a lot, is subject to all my sister's drama and can't do a darn thing about it) also sees how shitty they are, but my sister shuts her down the second she tries to bring it up. My Dad was a piece of shit alcoholic abuser, and my Mom is seeing a lot of the same early signs in my sister's boyfriends, especially her current one, but my sister's got her love blinders on.
Her current boyfriend got out of the army maybe a year and a half ago. The plan was it was going to be his last tour- he's been in for either 20 or 25 years now, has like 5 or 6 kids of his own, and so he was gonna take the pension, retire, get a house somewhere to get his kids away from their shitty Mom (I tell ya, my sister's drama always has so many layers, it would make an onion jealous). Apparently he was supposed to meet certain requirements upon getting out to start getting the pension, which I don't think he's done yet. He mooches off my sister for rides since he doesn't have a car of his own. He'll invite himself over to the house, often just by walking in unannounced. My sister, who's the one who cooks, can often spend an hour or more making dinner for everyone, and more often than not, as soon as it's ready, he'll take one look at it and say he's gonna go get fast food somewhere. Last holiday season she even let him
move in to the house (her room is in the basement), and hadn't run it by my Mom at all. Thank god it was only a temporary thing and he's since moved out (and moved back in his with his ex/baby mama). Helen Keller could see all the red flags this guy's got going on, but because he calls my sister pretty and spends time with her and her kiddo, she's head over heels for him.
I do love my sister, of course, but she's hard to root for sometimes. She and I each took after one of our parents moreso than the other, and she definitely took after my dad. Not her fault, of course, but she also makes no strides to better herself. She's
very quick to anger and outbursts, she won't take responsibility for any wrongdoing and hides behind lies (the amount of times she's made my poor Mom feel crazy by saying "I told you X thing a couple days ago" when caught in a lie is absurd, honestly). She has a job as a school crossing guard which, while she loves it and the kids love her, doesn't pay well and she only works a handful of hours a week, but she has no desire to look for anything better. She does help my Mom with a lot of things- she's there to pick her up when her legs give out, etc., but there's so much around the house that she doesn't do- things that clearly need to be done- and because of that, my Mom just ends up doing them and hurting herself more. My Mom, who's practically made of glass at this point, has to park in the driveway or the street because my sister has claimed the garage, which, especially in the winter, when my Mom is in constant pain, is such a hassle for her. My Mom pays for most of the things around the house; my sister pays for food because she's on food stamps, but almost everything else is my Mom's money. She is in therapy, but refuses to take any sort of medication for her issues because she took one medication one time and it gave her a slightly bad reaction. But she also just doesn't think she has any issues. It's maddening. And I feel like that's just half the story; I'd probably crash the forum mentioning all the other layers to the story.
While I'm certainly sorry that others are dealing with their share of family drama, it does make me feel slightly better knowing I'm not the only one with a hard-to-handle sister.

And all of this is on top of my nibling (my sister's kiddo- their preferred term, since they're non-binary), who just started dating for the first time as well. I love them to death, and I'm happy they're happy, but man, looking at young love from an older, more experienced standpoint, and
knowing full well I was just as cringe-inducingly sappy with things before life made me jaded; it's both slightly painful and lovely to see. I hope they never lose that wide-eyed optimism, but the odds are against them, poor thing.