//URGENT// ive really done it this time

okay so my best friend invited me over for the night and ive been really good friends
with the family for a long time and tonight while we were all out together her brother and i talked the whole time. flash forward to a couple hours later he texts me from the other room telling me to come here and talk. being a good friend i comply and end up making out and cuddling with him for an hour and a half... ive basically accepted him as my brother but after that i feel otherwise. the family would be really confused if we decided to go out and idk what to do. is this ok?