Riza managed to get just a little bit more of Shia's cock into her mouth, but not much, still only a small part of the giant shaft really. Riza wasn't exactly well practiced at this kind of thing, none of her boyfriends had even come close to this size really.
When the ambassador came however, Riza most definately had not been ready. She had been expecting some warning, but when she suddenly felt the thick substance filling her mouth she tried to pull away, only to find her head was held in place. She gurgled as the thick blue cum flooded her mouth, the woman having no choice but to start swallowing down every last drop, only small amounts escaping from her lips, drooling down her cheeks and Shia's cock.
When the ambassador finally finished cumming, Riza forcefully pulled away, using her superior strength to get herself away whether Shia liked it or not. "S-swallowing wasn't part of the deal damnit!" She growled up at the alien, then suddenly stumbled, taking a step back. "Wh-what...." Riza's breath started to grow heavy, an intense burning sensation beginning in her stomach and beginning to spread. Unknown to either of them, that much alien cum acted as an intense aphrodisiac in humans when ingested so fresh. The heat quickly began to spread through Riza's body, her nipples becoming so hard they were visible even through her suit, whilst her pussy was growing so wet that she could feel the fluids beginning to run inside of her suit. "Wh-what's....what's happening......oooh..." Every nerve in Riza's body was starting to feel alive with pleasure just from the touch of her skintight uniform.