Tell Me About It: Is sister boycotting the births?

Question: I always thought my younger sister and I were close. When I was pregnant with my first child I expected she would come to the hospital with my parents to congratulate me and be there for me. She didn't drive the two hours with my parents because she partied too much the night before. I was truly hurt and told her this. She apologized and said she didn't think I wanted her at the hospital.

With my second child, I knew the date of my C-section. She made plans to go on a cruise during this time; she said she needed a vacation. I told her I really wanted her to be there, but she didn't come.

Do you think she may be jealous? I can't help but hold a grudge, and I don't understand why she would deliberately not be there for something so important to me. She's a good aunt otherwise. Your input?

Answer: Since she let you down twice in the exact same way, and apparently doesn't disappoint you otherwise, I urge you to give her a pass on these and assume she had her reasons. (Like, er, a chance to go on a cruise?)

Caveat 1: Assume general reasons, not specific ones. Positing jealousy, for example, inclines people to feel superior, which will hurt you here - as will assuming that her priorities match yours, or that yours are more appropriate.

Caveat 2: Note the "apparently." If your sister is a good aunt but has disappointed you otherwise, then use the childbirth disconnect as a nudge to look at your relationship with her more closely. People who have known each other since childhood often forget to update their images of each other to account for time, divergent experience and (im)maturity.