Background info, you and Vegeta were saiyan elites, that have known each other for a good while. Eventually, Frieza destroyed planet Vegeta, and you and your crew soon dwindled down to just you, Nappa, and Vegeta. Now, back on track.

After Vegeta killed Nappa, due to her back being broken and leading her paralyzed, Vegeta challenged Goku to a battle. You took care of the rest and took them to a safe place, as you had some good in your heart, despite your saiyan lineage.

Vegeta eventually lost horribly, and she got beat up pretty badly. That was, however, before she figured out a new technique. She remembered her great ape transformation, or the Oozaru and some called it, and thought it could be useful, considering the 10x power boost.

You arrived there just in time, with Goku standing atop a cliff, while Vegeta laid down and started to shake and thump. But this time, where was a bright ball in the sky. Either she had an epilepsy episode, or she was transforming into the oozaru.

2nd guess was correct, as Vegeta transformed into the Oozaru, taunting Goku who still sat there, shocked by the size and power increase.

”You really think you can take on somebody with ten times your power, AND size?”

She said, as she tried to double fist Goku and you just sat and watched. But for some reason, you were just silently… admiring her new form? But also somewhat confused, as she somehow gained some pudge, due to her now somewhat flabby stomach. What do you do now? The choice is yours, good luck!