Hello all. I am new to this site and need advice ASAP. My stepdaughter is 19, been her step mom since she was 10-11 years old. Like all relationships, we've had our ups and down but for the most part it has been great. Her father, my SO, is 10 years my senior and me and her and I are 15 years apart so she sometimes looks to me as a "big sister" for advice. Sounds weird but it is so true. So the other day she texts me and asks if she can ask for my advice (which is normal for her) at first I thought it was boyfriend issues or college stress.