Was trying to figure out why greyhide threesome never triggers for me.  My original assumption was holding off on getting Alexia drunk event until both her and Rowan were sufficiently corrupted to like swinging.  Since nothing happened after they had their threeway with Lurial I started grepping through the events looking for greyhide stuff.  Here's what I found in ruler_events_16.rpy:
	
	
	
		Code:
	
	
			    event('after_drinking_greyhides_alchol', triggers="week_end",
        conditions=('NTR', 'ev_happened("greyhide_s_table_manners") or ev_happened("greyhide_shares_his_people_s_liquor")', 'avatar.corruption < 20', 'all_actors["alexia"].corruption < 20'),
	 
 It doesn't make sense that our illustrious duo would only contemplate swinging if they were both still very untainted.  I think the event creator fat fingered the script code, got their logic test bass ackwards, and the event statement should really look like:
	
	
	
		Code:
	
	
			    event('after_drinking_greyhides_alchol', triggers="week_end",
        conditions=('NTR', 'ev_happened("greyhide_s_table_manners") or ev_happened("greyhide_shares_his_people_s_liquor")', 'avatar.corruption >= 20', 'all_actors["alexia"].corruption >= 20'),