My youngest sibling (I have 7), got adopted while she was in the foster care system (my childhood and parents were pretty fucked). Forunately, her adopted parents are really amazing, kind people and got in touch with one of my other sisters and have since made every attempt to include all of us in our sister's life.
This week, my sister's adopted mother surprised my sister with a trip to Arizona partly to see the mother's friend but also so my sister could meet our brother and nephew for the first time. The adopted mother thought I still lived in Phoenix and was excited for me to be there as well... so needless to say, I immediately booked a plane ticket for the only 2 days I had free to go and now I'm here!