Aunt May is a very likely candidate. She has always been like a mother figure to Peter. She would notice that he's dirty or injured after a day of being Spider - Man and would gently lead him to the bathroom to get cleaned up. It would be a very nurturing moment between them, with Aunt May scolding him a bit for getting into so much trouble but also showing her love through taking care of him.
Perhaps Peter gets caught in some sort of gooey slime during a fight with a new villain. His suit is completely ruined and he's covered in the stuff. His friends, like Ned, come over and they end up having to give him a bath (in a very non - weird way) to get the slime off. During the bath, they joke around and talk about the latest Star Wars movie, which lightens Peter's mood after the tough fight.
The boy might play with the bubbles in the bath. For example, he could make bubble beards or hats. The babysitter would probably have to remind him to stay still so she could wash him properly.
I'm not sure which specific 'boy given a bath story' you are referring to. There could be many different stories about a boy taking a bath. It could be a simple story about a mother giving her young son a bath, with details like the boy playing with his bath toys and making a mess in the tub.
One story could be that in a family, the mother gives her young son a bath every evening. She fills the tub with warm water, adds some fun bath toys like rubber ducks. As she washes his hair gently, she tells him stories, making bath time an enjoyable and bonding moment.
It could be a vengeful criminal that Spider - Man has put away in the past. This criminal has spent years in prison plotting his revenge and finally gets the chance when Peter is vulnerable. Maybe he manages to ambush Peter in an alleyway while he's on his way home from school or work.
Maybe the main event is the actual act of bathing the boy, like pouring water over him and using soap.
Maybe it's his father who gives the boy a bath in this story. Sometimes fathers like to be involved in taking care of their kids in this way too.
I'm not sure of any extremely famous stories specifically about this. However, in many fictional works, it can be a common scene to show maternal care. For instance, in some family - centered novels, the mother's act of bathing the child is briefly described to highlight her nurturing role.
Once upon a time, a mom prepared a warm bath for her little daughter. She gently undressed the girl and slowly helped her into the tub. The mom then took a soft washcloth and carefully wiped the dirt off her daughter's face and body. The daughter giggled as the mom made funny shapes with the soap bubbles. It was a sweet and simple moment of mother - daughter bonding.
Definitely Tony Stark (if he were still alive in the fanfiction). Tony has always been a mentor to Peter. His vast knowledge and resources could be invaluable in helping Peter deal with whatever problem he has. He could create new gadgets for Peter to use in case his omega situation requires special equipment.