"I'm allowed to have her but you are the one I'm serious about."
You are currently being groomed to accept a reality where your partner's needs are the only ones that matter. When they say 'I'm allowed to have her but you are the one I'm serious about,' they are explicitly telling you that you are a secondary priority in your own relationship. Your attempt to use logic—'Then why can't I talk to someone else?'—is a futile exercise because you are arguing with someone who has already decided that the rules do not apply to them. They are using the 'I'm being honest' defense to bypass accountability, effectively turning their confession into a weapon to keep you compliant. You are not in a relationship; you are in a hostage situation where you are being conditioned to accept betrayal as a form of intimacy.
The partner holds absolute power by setting the rules of the relationship unilaterally. They use the user's emotional attachment to them as a leash, effectively gaslighting the user into believing that 'honesty' about cheating negates the act of cheating
The user is confronting a partner who is openly maintaining a secondary romantic relationship while demanding exclusive commitment from the user. The partner is utilizing blatant gaslighting and double standards to maintain control over the user's behavior while justifying their own infidelity.