I'm not sure of a specific 'female vegeta beats goku fanfic' off - hand. You could try searching on fanfic websites like Archive of Our Own or FanFiction.net. They have a vast collection of Dragon Ball fanfics and you might find one that meets this criteria there.
It could be that female vegeta has been training in a secret location with a unique training regime. This gives her an edge over goku in combat. For instance, she might have trained with some ancient master who taught her a special form of ki control that goku has not mastered yet. So when they face off, she is able to use this advantage to defeat him.
There's also 'The Unspoken Alliance'. In this fanfic, Goku and Vegeta are forced to work together in a situation where their powers are limited. It's interesting to see how they rely on each other's skills and personalities to overcome the challenges, which is quite different from their usual power - based confrontations.
One popular fanfiction might be 'Goku and the Female Saiyan.' In this story, it could explore a unique relationship between Goku and a female version of Vegeta. They might team up for battles and during their adventures, a deep bond forms as they learn from each other's fighting styles.
Well, 'A Female Saiyan's Tale' is quite interesting. In this fanfiction, the female Vegeta has a different take on the Saiyan pride compared to the original Vegeta. Her interactions with Goku are filled with both tension and mutual respect. Goku, in turn, helps her to see the value in things beyond just power and victory. There's also 'Female Vegeta and Goku: A New Alliance' which focuses on them forming an unexpected alliance against an ancient evil that has been awakened in the universe.
One popular 'female Goku and Vegeta fanfiction' is 'The New Saiyan Warriors'. It presents a really interesting scenario where female Goku and Vegeta have to team up in a different way than in the original series. Their interactions are full of unique dialogues and the plot has some great twists.
One popular Goku and Female Vegeta fanfiction is 'The New Alliance'. It explores an alternate universe where they team up to face a powerful new threat. The story does a great job of developing their relationship in a unique situation.
Well, there's a fanfic called 'Goku and Vegeta: A New Alliance'. In this one, they are forced to team up in a way that they never have before. It's interesting because it explores their different personalities and how they learn to work together. It also has some cool plot twists that keep you reading.
Well, I know 'The Saiyan Heart'. In this fanfiction, the female Goku and Vegeta's relationship starts from a series of battles and gradually turns into a deep emotional connection. It shows how their Saiyan pride still plays a role in their relationship but also how they overcome some traditional Saiyan behaviors for the sake of their love. There's also 'Destiny's Union' which is quite interesting as it brings in some new elements to the Dragon Ball universe while focusing on their relationship.
One great Goku and Vegeta fanfiction is 'The Rivalry Reborn'. It delves into their relationship, exploring how they train together and face new threats. It has some really interesting character development for both of them.
I'm not sure specifically which 'goku y vegeta lemon fanfic' stories are the best. You could try searching on fanfiction platforms like Archive of Our Own. There might be some interesting ones there that explore different aspects of Goku and Vegeta's relationship in a creative way.