adulterous affair
adultery
affair
amour
concubinage
criminal conversation
entanglement
eternal triangle
extracurricular sex
extramarital relations
flirtation
forbidden love
fornication
free love
free-lovism
hanky-panky
illicit love
incest
infidelity
intrigue
liaison
love affair
premarital relations
premarital sex
romance
romantic tie
triangle
unfaithfulness
score
sexual conquest