Well that was easy. For a brief moment she felt frustrated that so much time and exertion had been poured into plotting and making sure the evening unfolded smoothly. Apparently this end goal probably could've been accomplished in half or less the time. She'd never been a fan of wasted effort or time. Spice had a mental forehead slap moment, shrugged it off, and decided to just be happy. This is what she'd been craving and needing after all. "You're a genuinely nice pony, aren't you?" she asked although it was really more of a statement. She was very surprised he was willing to offer it without coercion since no one had before. And as far as blood banks went she'd always assumed the only reason pones did it was for compensation which was clearly not the case here.
Whatever the case, two parts of reality dawned on her. 1) She was about to get what she wanted which made her feel giddy. 2) She was about to do a first, feed on someone willing which was...weird. Exciting but a little nerve wracking. In the past when they had to trick and take it by force she'd always let her vampire instincts take over which were pure thrill of the hunt. Just drinking it casually as herself and with someone she was kind of crushing on was definitely going to be different. "Neck is best, it's softest to bite into. You'll want to relax so it hurts less." she instructed and sat as close next to him as she could. "Alright, here goes." Spice picked that perfect spot and very slowly went about it so he'd know exactly when it was coming. Hopefully he wouldn't jerk in surprise and cause more pain than needed.
After that initial puncture Spice's head swirled dreamily as she closed her eyes, forgetting everything except the utterly spectacular life essence melting its way down her throat. It heated her in the most relaxing way imaginable and was hooves down the best flavor she'd encountered. It was unbelievably sweet, almost like candy, and had that cleanness that only pony blood had. She ended up leaning into him completely, resting the weight of her head on his shoulder while she greedily imbibed without any thought of time. When a long moan of contentment escaped her she realized she'd gotten completely carried away and humiliated herself. Almost halfway in his lap at this point, she unattached from him and sat back where she'd been before blushing the deepest red she ever had in her life. Too humiliated to look at either Fox or her twin she instead stared at the ground and stammered "Um, thank you. Your...turn. Tart."