Well, in the 'big mom is luffy's mom fanfic', they might have crafted a story where Big Mom is Luffy's mom. But it goes against what we know from the official 'One Piece' story. Fanfictions like this can be really interesting as they can rewrite the story in unexpected ways. They might have some interesting plot twists and explanations within the fanfic to justify this relationship, but it's not part of the main 'One Piece' universe.
One possible plot implication could be a change in Luffy's power source. Since Big Mom has such unique and powerful abilities, Luffy might inherit or be related to some of those powers in the fanfic. Maybe his Devil Fruit ability could be related to Big Mom's in some way.
As of now, in the manga, the identity of Luffy's mom remains unknown. There have been many theories and speculations among fans, but no official confirmation.
Well, a 'big dick reaction story' might refer to a narrative where a character has a strong response to a situation that is somehow related to the idea of 'big' in a non - literal sense, like a big opportunity or a big mistake. But this is just speculation as the term is rather ambiguous.
If 'big cock' is not referring to a rooster but rather some sort of large object or mechanism named 'cock' (although this is a bit of an odd and less common usage), then the reaction story could be about how people or things interact with it. For instance, if it's a large lever or knob (referred to as a 'cock' in some old - fashioned or very specific mechanical jargon), the story could be about how workers in a factory react when this large 'cock' is activated or adjusted, perhaps there are initial difficulties in getting used to it, or some unexpected outcomes due to its large size.
Others in the yoga class could have different reactions. Some might giggle or try to hide their laughter, while more understanding people might just give a sympathetic look or even say something like 'It's okay, it happens to all of us'. The yoga instructor might also be very professional and continue the class without making a big deal out of it to make the mom feel more at ease.
My mom's reaction to my crossdressing was a bit mixed. Initially, she was confused and a bit disapproving. But after I explained to her that it was just an expression of myself and not something bad, she started to come around. She still has her concerns, like whether I'll face discrimination, but she's trying to be more understanding.