Responses

for a sec i thought i got it wrong, but Ethan is the vampire & Tristan is the human.
about Wren, 99% sure the only feelings he had for Tristan were platonic, but as it has been a while can't be 100% sure & too lazy to go search out the chapter to back-up my assumption (≧∀≦)
but like u, i hope they don't cross the line for the sake of any of the character's involved`(*>﹏<*)′
telling him about how he murdered his father etc.. Tristan was about to confess his attraction/infatuation/love from Wren (on his 18th B-day). & there was nothing platonic about how he felt.
Wren was the one that always just saw him as a kid. so his (Tristan's) blushing is bad - cause of his relationship with the MC. but also understandable, cause (i guess) feelings like those don't just disappear ┑( ̄Д  ̄)┍
on the other hand i just feel bad for Wren, cause he has been tortured / brainwashed & sexually abused within an inch of his life. so his reaction to Tristan's blood isn't shocking, as Tristan's blood-related to his abuser (〜 ̄△ ̄)〜 who conditioned him while feeding him blood &... this has turned into a sh*tshow & i Don't get anyone cursing on Wren the main victim( ̄へ ̄)