Welcome back queens and kings of the internet. Family relationships can be tough. Through the years you may develop animosity or hostility towards each other, for one reason or another. Jealousy could tear relationships apart, and it takes a certain level of maturity to be on good terms. Things could heat up when you feel envy for your sister's seemingly perfect life. She's in a great relationship, she's happy, she's going to be married. It can be hard to understand fully what this all means, or how it will affect your relationship with each other.
In this Reddit thread, the original poster (OP), is used to having a great relationship with her sister, until things change. With her increasing closeness with her partner, her sister becomes more and more resentful. It even gets to the point where her sister is telling the entire family rumors about her partner, knowing they aren't true. Her wedding invitation is revoked from her immaturity, and the internet speaks up in the OP's defense.