Oh my God, if Lachlan found out his reaction would LIGHT THE SKY ON FIRE. The RAGE. The jealousy! Not sexual jealousy, but platonic jealousy can be just as intense, especially given the sibling aspect of their relationship. Lachlan is Ewen's FOSTER BROTHER and he would DIE FOR HIM and instead Ewen is turning to this INCUBUS OF AN INTERLOPER who has clearly SEDUCED him into an improper relationship!!!! Lachlan must break it up. FOR EWEN'S OWN GOOD.