Second, she now thinks it’s appropriate to spend three to four nights a week at my in-laws’ home and invite herself on outings she wasn’t invited to. (He won’t even let her tell people they are friends, and tells everyone he doesn’t even like her.) She keeps telling me he’ll realize he actually loves her, “one day.” Problems have since arisen.įirst, I’m upset my sister is sleeping with someone I now consider family, and for whom this is essentially just a booty call. Dear Carolyn: I married the man of my dreams, only to return from our honeymoon to find that my twin sister has been secretly sleeping with my now brother-in-law.