>>104863627Sometimes this is true, sometimes it's not true.
Like SmugAlana for example.
That guy is her real blood related older brother, married to a chick and has a kid with that same chick.
Some siblings get on and some don't. Some are very very close and some are not.
You can bond with a sibling closer than a parent sometimes, you know the whole daddy's girl, momma's boy type thing but with a sibling.
And in very rare cases during puberty a sibling can get their wires crossed.
There have been cases of BRO or BROTHER being used to described their boyfriend / husband like the cases of Skye Shinryu or Onigiri skyebro or onibro, that are in fact NOT their brother but rather their lover.
Usually the key is to see if they tell a lot of stories about their early childhood together or if they seem to never have a story at all and never want to mention them much or much of their past together during childhood
Because they'd have to lie and make it up Statistically you will find a chuuba that HAS or wants to fuck her real brother.