of course! the sister could be either older or younger, i don't really have a preference but i would love for them to be close after being really distance and hating each other when they were younger. they were raised by their mother, the dad left the picture when luke was 3. for the danger zone female, he was married to ~busy and admittedly had some maturing to do, so in addition to being pretty emotionally unavailable and being a pain in the ass, she would've been someone he met who was clearly interested in him and the towed the line of what was appropriate/not appropriate. she would've contributed to his divorce, but was one of several things that caused the dissolution of his marriage.