I find two partially contradicting definitions of cuckold. One is a man who takes sexual pleasure in his wife being used by another man, which is the case for Tony when he is present. The other is a man being deceived by his wife being in a sexual relationship with another man, which applies to Rump. Why it would not apply to Harold is not clear to me. And, sure, Erik is not in a relationship with June, but he wants to be and is betrayed by MC. And why would Erik's dad being in jail make him not a cuckold when his wife fucks around?
But I am fine with anybody saying differently. Just wanted to mention.