What happens to siblings when one turns out to be gay? Sometimes, nothing at all. Sometimes, extraordinary events ensue.
Book 3 of the series is subtitled “from sci-fi to fantasy.” It includes a strange infection from a remote jungle, a plague where a surprising subgroup appears to have immunity, an alien lover, dream-chasers and -catchers, plants that alter one’s basic goodness, a group of teens who face the possible end-times and make surprising discoveries, a man who discovers the perils of time travel, and more.
Fraternal, book 3, by Michael Scherperel, ISBN 978-0-9995979-7-2 (Kindle edition--available free to Kindle Unlimited members). See also the Fraternal Anthology for all 54 stories in one volume.