unexclusive

“AP was the most unexclusive of men and Hammersmith Terrace supported a rich social mix of those of modest incomes and the moderately wealthy.”

The Guardian: Letters: Birds of a feather

“For most of the conversation, he says nothing, though it's revealed that Stoya and Danny have an unexclusive (yet kind of monogamous) 5 sexual relationship, which they don't care to discuss in depth.”

The Clog