I'm not aware of any such fanfiction. Fanfiction usually focuses on the characters' adventures, relationships, and powers, rather than such odd combinations. It's also possible that such a concept might violate the terms of use of many fanfiction platforms as it could be inappropriate or not in line with the spirit of the original characters.
The Vulture could be a great villain. He has his own flying capabilities and could pose a real threat to Spider Man and Wasp. His experience and his greed for valuable items could lead to some intense battles with the duo as he tries to steal some high - tech gadget that Wasp has been developing.
A great plot could be that a powerful alien artifact has been stolen and Spider Man and Wasp are wrongly accused of the theft. They have to work together to clear their names and also find the real thief. Along the way, they discover a conspiracy that is much bigger than they initially thought and they have to use all their skills and wits to expose it.
They could be portrayed as friends and comrades. They respect each other's abilities and are always ready to back each other up in a fight. For instance, when one is in trouble, the other will rush to their aid without hesitation.
Maybe in the fanfic, Spider - Man and Wasp are framed for a crime they didn't commit. They then have to prove their innocence while also dealing with other superheroes who are after them. They would need to combine their skills, with Spider - Man using his strength to fight off attackers and Wasp using her stingers to defend themselves when in close combat.
In a fanfiction, the lemon could be a symbol of purity or a source of energy. Spider - Man, with his sense of responsibility, would want to protect it. Wasp, with her scientific knowledge, could analyze it. They might interact with the lemon in a way that it starts to communicate with them on a psychic level. This could lead them on a quest to find out the origin of the lemon's power and along the way, they face challenges from other super - powered beings who also want to harness the lemon's power for their own gain. This would involve a lot of action, adventure and some deep conversations between Spider - Man and Wasp about the nature of the lemon and what they should do with it.
One possible plot could be that Spider - Man and Wasp team up to fight a villain who has a strange connection to lemons. Maybe the villain is using lemon - based technology to create chaos in the city. Spider - Man's agility and Wasp's ability to shrink and fly would make for an interesting dynamic as they try to figure out how to stop the lemon - themed attacks.
Here's a more detailed fanfiction idea. Spider - Man has been feeling a bit down lately, so the Wasp decides to cheer him up with a birthday celebration. She bakes a lemon pie from scratch, which takes her hours because she's not much of a baker. Meanwhile, Spider - Man is out on patrol, not suspecting a thing. When he gets back to the Avengers compound, he's greeted with a big 'Happy Birthday' sign and the smell of fresh lemon pie. The Wasp tells him how much she values their friendship and how he's always been there for her. They sit down, enjoy the pie, and talk about their hopes and dreams for the future. Spider - Man realizes that no matter how tough things get, he has great friends like the Wasp by his side.
One idea could be that Spider Man and Wasp team up to fight a new villain that is causing chaos in the city. Their partnership gradually turns into a romantic relationship as they discover more about each other during their battles. Another plot could involve them getting trapped in an alternate dimension where they have to rely on each other to find a way back home, and during this time, their feelings for one another deepen. A third plot might be that Wasp is in danger and Spider Man has to go to great lengths to save her, which makes her see him in a new light and start a relationship.
A simple plot could be that it's the Wasp's birthday. Spider - Man, knowing her love for unique things, gets her a lemon - infused perfume. They then go on a rooftop adventure to celebrate, looking at the city lights while sharing stories about their first encounters.