No Man's Land (Asher #4)
Zoe Nichols

The threesome has been sliding south since Derek slipped a promise ring on Asher's finger, drawing a line in the sand no one can miss. Tension erupts, and Asher and Derek are left to fit the pieces back together, scared that they no longer fit without Dean. Guilt-ridden, Asher and Derek fight like hell, pushing each other to the breaking point. Can they find a way to keep love from sliding into something like hate?