If both you and your husband sleep with other people that would make you guys swingers. But if only you, the wife, gets to have sex with others & he enjoys seeing it, hearing about it or joining in that makes you a hotwife & him a cuckold.
You don't have to be bisexual or into all the more kinky or extreme stuff that some couples do to be a cuck although, some couples do consider creampies, BDSM, femdom & FLRs and even bisexual acts & feminization of the hubby to be the natural progression of a cuckold relationship but There is no rule that says that you have to go down that road or do any of those things to enjoy being a hotwife or cuckold.