Welcome back ladies and gentlemen of the internet. When you fall in love and get married, you adopt not only your partner into your life, but you also adopt his family. You become so intermingled that you may even refer to your in-laws as 'mom and pop.' The close familial bond can be beautiful, and you may find yourself with a whole new set of family members who have your back when times get tough. Your mother-in-law could be like your second mother – nurturing, loving, and a shoulder to cry on. She also understands your husband in ways you don't, so it's not a bad idea to take notes!
In this Reddit thread, it involves a family, and two separate daughter-in-laws. The original poster (OP) has been invited (along with her husband) to her in-law's house for a family dinner. They gladly accept, only to be harassed later by her SIL for excluding her. The jealous SIL even goes to the trouble of uninviting her from her baby shower!