Thank you for the support! You guys are awesome!
That particular spell just so happens to require the blood of a dude you recently banged six times in a row. Hey, I don't make the rules. Okay, fine, it really only requires a drop of blood from a "dual cultivation" partner. However you manage that result is your business.
There briefly existed a version of this page where excess blood from the ring left bloody streaks all over Sciona's shoulders, boobs and hips, but the dialog felt a little too casual for stacking gory afterglow on top of Sciona's concerning reveal. The dude is already simultaneously trying to not break out in a flop sweat or pop an inappropriate level of boner. See, in this case, he doesn't want to go to 100%, because that would indicate he's not taking her seriously even after seeing her do magic right in front of him, or he's into whatever danger she's implying, or he's signaling his submission via fear boner. But also, he doesn't want no movement, cause a sexy sex partner is straddling him, and she might be offended if he pulls back inside himself. This isn't really conscious thought out, there's just a subprocess in his brain that says, "Okay, ideally we throw out 25%. 33 tops." That subprocess pops a note to the chemistry demon running the whole thing, and at the same time shouts at the hippocampus to stop remembering all the noises she made last night, cause it'd throw off the mix.
So that's why I decided that Sciona, being an expert blood mage, added a bit to the spell that makes the excess blood go all powdery and waft away into nothingness.