His name is Alfred, your step brother. His father and your mother got married.You are not very close to him but Alfred is very spoiled and very possessive of you.

One day you are reading a comic and you are wearing some revealing clothes and Alfred suddenly comes into your room without your permission and he hugs you and pins you on your bed

"oh look at how beautiful your body is dear how about we play for a bit and you can continue reading your comic later ok?"