Despite my high-income family, as a teenager I rebelled against authority. I got into trouble with the law, dropped out of school, etc. Over the last two to tree years, I've changed my life  - I’m off probation, returned to school and graduated, soon pursuing a degree.    
      One older sister graduated college, the other one’s in university. After high school they received laptops and had their rent, cellphones, groceries, etc. paid for while pursuing degrees, and didn’t have to work.    
      Recently, my parents said that although I’m living at home while in school, I’ll have to continue working and won’t receive help with income.         
      I know I’m lucky to have them pay tuition but feel it’s unfair that I don't get a new laptop or have my cellphone and other expenses paid for, like my sisters.       
      Being in college and working may be too much for me. My parents are proud of my return to school, but I know if I chose an out-of-town college, I’d have these things paid for. Am I being too spoiled??
      - Confused

Yes, you’re expecting entitlements that are not yet earned … though you’re on a path whereby they may be, if you stick to your changed lifestyle.    
      Your parents are proud, but also practical and wise. They’re happier to have you living at home – thereby paying for your housing costs – to help you avoid reverting to old influences due to loneliness or stress. Instead, they’re supporting you in ways that matter most - emotionally and encouragingly.    
      You need only work part-time for your spending money. Do your best at this plan for six months, and then ask to discuss the situation. If it’s going well, they may pick up some of your extra costs.

My sister-in-law lives in a different country; I’m happily married to her brother  (they’re very close), and we have three children.      
      Our sister-in-law relationship soured prior to our wedding 15 years ago; many of my actions were perceived as disrespectful to her. My husband and I nearly called things off. His willingness to do so hurt and upset me.    
      I see his sister every two years when we visit his family overseas. Numerous episodes usually involve her blowing up and becoming verbally abusive towards me. She never holds herself accountable, later pretending nothing happened.      
      But I get stressed. Our relationship affects my mother-in-law with whom I really get along, but she’s put in the middle. This summer we’ll be visiting again. How do I enjoy myself with my own family and deal with her at the same time?
      - Already Anxious

Remove yourself from the power/stress game by refusing to respond or take part. And get your husband onside - it’s time he helped you with this, since I suspect he’s stayed in the middle as opposed to his mom who gets stuck there.
      Start by bringing a gift for Sour Sis and have him say in your presence that it was your suggestion and choice, knowing it’s something she’d like.      
      Do NOT get drawn into any topic on which you know you two differ, e.g. child-rearing methods, etc. If necessary, say, “That’s a valid viewpoint, something I’ll have to think about.”     
      And make sure her brother speaks up when she argues against something you two do as a couple. He needs to know that he’s enabled this rift for far too long and let you take the brunt, so that his good-brother image never got ruffled. But his husband image is far less attractive.

My daughter and her terrific fiancé plan a destination wedding; I divorced her stepfather when the kids were grown. He’d been an emotionally abusive father and husband, had cheated and lied.      
      He’s not invited, but his sister will attend. She bad-mouthed me to my kids during the divorce, believing I overreacted and turned them against her brother.     
      How do I handle seeing her? I can’t see any reason for small talk. I’ll try to avoid her that week away, but it’ll be uncomfortable for me at the wedding.
      - Bitter

Your daughter clearly still considers her aunt as part of her family life, and so – at least for her wedding – you must rise above what’s gone before.      
      It was her brother who failed you. Unless you confided in her all along, she couldn’t know the whole story. Drop the bitterness; revel in your daughter’s happiness - and your own freedom from a crummy ex.