Not sure if anyone else has commented on it, but there's an unusual remark you get from Lorelei on what I've started thinking of as the 'addictive cum' route (probably a subset of the hypnocock approach to mind control). In the second opportunity you have to visit her (post-Dinner with Dante and Renee, where the ring can come into play) she has a different reaction to taking your load in her mouth.
Late edit, but I finally found the circumstances I wanted to demonstrate:
Prior flags I can conceivably think of include, both the ring and voucher appearing, but being unable to use the ring, and taking literally every opportunity to get a blowjob available in the game thus far.
You say, "I want to come in your mouth."
"Anything you wish," she says, softly.
She gracefully dismounts, and rolls onto her back. She closes her eyes tightly, and opens her mouth wide. You move into position. She makes small, encouraging noises.
With a few quick strokes, you shoot into her mouth. She gives a happy sigh as she swallows. Suddenly, she arches her back in an orgasm. "Ahhhh?" she cries out, bucking. She looks very surprised.
Her spasms take surprisingly long to die down. "That was... incredible..." she says in a soft murmur.
I'm very keen to see if that branch bears any interesting fruit.