He is in college and can now have sex with his brother
The limitations that society places have already gone with his young age. He recently turned 18 and is also studying at university. It is the time when you have to explore your sexuality and you have to do it in every possible way. That’s why this young girl thinks she can fuck her brother now. Because there is no law that says she can’t do it, so she puts his cock in her mouth and once she sees that it is hard, she proceeds to open her legs so that he can penetrate her pussy. It’s what he’s been waiting to do the most and now he’s doing it.