Kuno bowed before Soun. "I have disgraced your daughter and wish to make amends. I humbly request her hand in marriage."

"My daughters are getting married!" Apparently Soun had heard Genma's idea for a double wedding.

"What?!" Nabiki punted Kuno into the koi pond. "I thought you did NOT want to get married."

"But Nabiki-chan... for the last fortnight we've truly gotten to know each other." Kuno glanced over at Ranma. He would not admitt fear in front of him. "It is my duty to marry you."

"I don't care if we have been lovers for the past two weeks. I am not ready to get married!" Nabiki turned around and marched off to her room.

Akane and Ranma exchanged glances. No wonder Kuno hadn't been annoying them lately.
 
"You will convince her." The tip of Soun's spear pressed lightly against the underside of Kuno's chin. The Tendo patriarch's face showed the signs of crying, but held a lot of anger. "You have taken her purity and you will correct that."

Kuno was slow to perceive some things. But even he knew that informing the outraged father that he had not been Nabiki's first partner would not be healthy. "I shall endevor to try."

"Good. Now hurry to her!" Soun was ready to cry again. Nabiki was getting married to that nice rich and slightly insane boy. He wouldn't have to worry about her anymore. All that was left was forcing the double part of the wedding and finding Kasumi a husband.

Interesting and possible. But it's not correct. Maybe it was Taro or maybe it's not Nabiki.