Monica was glaring daggers at Lydia and her boyfriend and the next step in the aquatic battle seemed moments away when someone else splashed into the pool between the rivals: Monica's boyfriend. Lydia figured he was going to fight them too, but as a human would be at a disadvantage to two mers. He ignored them and went straight to Monica.
"Get out of the way, you lug!" she screamed. He ignored her and pinned her to the side of the pool. "What are you doing? Why are you...oh!"
Monica's arms and tentacles wrapped around her boyfriend as he preceded to fuck her against the side of the pool. He'd never told Monica about the tentacle porn he watched or his longtime fantasy of banging Ursula. The moment his bitchy girlfriend turned into an octopus mermaid he got the biggest hard-on of his life.
Monica now almost everyone's attention. Some partygoers turned away. Others shouted and cheered or jeered the spectacle.
Lydia and her boyfriend retreated to the opposite end of the pool.
"I never thought Monica getting plowed would save me from a fight" Lydia muttered. "But, as weird as it is to say this about Monica, it's actually turning me on..."
"You want to have sex in front of everyone?" her boyfriend asked.
"I've never wanted it before as a human. As a mermaid, the thought kind of turns me on."
"We've both been outed as mers so it's not like it could cause us much more embarrassment" he replied. "And it's the quickest way to get our legs back anyway."
Lydia and her boyfriend started kissing. He ran his hands up under her prom dress, caressing her breasts as they sank to the bottom of the pool, tails entwined. Only a few people noticed. Most were still distracted by Monica's flailing arms.