i mean reading any sex scene and someone finding out will always be awkward, but it depends on how supportive/chill your brother is. if he's fine with the lgbt community and you are around 16+ him catching you reading a yaoi smut scene he probably won't be that bothered. depends mostly on the person though.
Guys watch a fuck ton of porn, why can't girls? Besides if he were to say anything they will be more likely to believe you over a guy, 'women don't watch porn' and such, for some reason society always views women as innocent, either that or a whore. If I was caught it would be a good thing because I have zero interest in starting a family despite what my parents want. Just because I'm reading two guys going at it does not mean I'm popping out grandkids.

Will i be scared if my brother found out that i'm reading yaoi and it happend that he caught me in sex scene of what i'm reading. I'm girl tho. So is it weird? Can anyone answer?