Thanks to everyone for this great input!
@Bill B. it is being structured as a gift. And it's so last minute because this is just how her family operates. She had been promised for years to be added to the LLC, we're shocked it's even happening.
@Bill Exeter Thank you for your questions and insightful input! She's being added now because the family just does things backwards, there's no better reason for it. This is something that should've been done years ago, but hey, we play the hand we're dealt.The goal is to allow her to inherit half of the proceeds from the property, rather than her brother just gifting her hald afterwards. Unfortunately, even if this isn't the wisest strategy, her dad calls the shots over the LLC without being on it, and its his way or the highway.
@Dave Foster thanks for the great input as well! This seems like a viable option and a financially savvy option. I will bring this to my fiance to discuss. The biggest issue I see is that her brother is a royal pain, and she'd likely rather take the tax hit than have to negotiate any real estate with him moving forward. But I will bring it to her anyway.