sexual relationship(n = noun.state) - a relationship involving sexual intimacy;
is a kind of relationship
has particulars: affair, affaire, amour, intimacy, involvement, liaison

business relationship, double standard of sexual behavior, family relationship, friendly relationship, human relationship, marital relationship, personal relationship, primary sexual characteristic, relationship, secondary sexual characteristic, sexual, sexual abstention, sexual abuse, sexual activity, sexual arousal, sexual assault, sexual characteristic, sexual climax, sexual congress, sexual conquest, sexual desire, sexual discrimination, sexual harassment, sexual immorality, sexual intercourse, sexual inversion, sexual love, sexual morality, sexual perversion, sexual pleasure, sexual practice, sexual preference, sexual relation, sexual reproduction, sexual union, sexual urge, spousal relationship