Is it normal to hate someone so much? If subjected to so much comparison by so many people, it is natural to feel hate towards that "superior" person. It is like that strong flash of envy we can experience when a close friend achieves something we covet. Your "hate" feeling is accompanied by a desire to rise above the comparisons and not have bad thoughts. The whole combination seems quite normal to me. That is tough tough tough. Ideally, parents can admire anyone but their love and support for own child should be close to unconditional. DDream has a neat suggestion above - agree with husband and in-laws when they praise her. Take that one step further - increase your relationship with Ms. Superior. Befriend her over whatsapp and other social media. Get to know about her life events. Join your husband and in-laws when they sing her praises. In the process, you will get material and information that you can use to tactfully show your in-laws that she is human after all. You will get opportunity to talk about this cousin's husband. When you are part of the praise-the-cousin gang, you can gently once in a while talk about not-praise stuff. If you can hold your nose and pull off the above strategy, it might provide some relief. As a bonus, it might also provide some amusement. Do take care though that you don't hurt the cousin, as she is not responsible for your suffering. Try to keep your contact with her as genuine as possible.