Getting into a relationship with my in law
hey for awhile now my sister and her boyfriend have had a baby and live together... but recently my other sister hooked up with the boyfriends's brother and everyone was really weird about them and i think both families thought it felt like incest... now the boyfriend's sister who is about my age, we are starting to flirt and be together all the time... we are pretty much inseperable whenever were around eachother.... my sister who is with the boyfriend is extremely disaproving of it and i dont know what to do... is it normal that i should feel this way?... advice please