I have a 19 year old stepdaughter who I have known for 5 years. Through the time I have known her she has maintained a severe attitude of disrespect, entitlement, and hatefulness directed at myself, her syblings, many in her family and others. After reading a lot of the input on this site it appears this is somewhat typical of stepchildren. However, what I find so difficult is there are so many red flags with her but my wife and her family just make so many excuses for her.