Sexual relationship legal/possible? Illinois Viewed 10 times. Posted 3 months ago in Marriage / Prenuptials Flag as objectionable Would a sexual relationship and/or marriage be legal with the daughter of my half-sister (same father, different mother?). Are there different rules on this in different states? Answer this question Add to list Share this Answers (0) No answers yet Here is some preliminary information and guidance regarding your legal situation while you wait for an attorney in your area to respond. Free and Low-Cost Legal Resources in Illinois Related Marriage / Prenuptials questions does WA state recognize common law marriage, WA meritrious relationships - if you live together for a period of seven years, are your legal rights the same as if you're married 1 answer. Yakima, WA. Viewed 271 times. Posted about 1 year ago in Marriage / Prenuptials California - living as married couple, but not legally married, what are my rights when the relationship disolves? - My children and i have been living in a rented home with my boyfriend (bf) for... more 1 answer. San Diego, CA. Viewed 36 times. Posted 4 months ago in Marriage / Prenuptials marriage/relationships - Does a person have any rights to apply towards their partner if they found out they had been paid to be in a professional adult film/films? Could they be required to say,... more 1 answer. Houston, TX. Viewed 126 times. Posted about 1 year ago in Marriage / Prenuptials Back to Search Results Ask a Question Get free answers from real lawyers. Question Question details City and state Required Next question: what age determines when a chld is of sufficient age and maturity to give imput on where they would like to live Previous question: Will a protective order show up on a criminal record?