You need to be a little more direct, even a little curt. Don't overthink this:
Girl: What's wrong [you're not staying hard]?
HiFlo: I just busted twice! I'm not a goddamn machine. It's easier to receive than to give.
Girl: What's wrong [you're so quiet]?
HiFlo: I just feel like being quiet. Stop interrupting my silence.
Also memorize this line. It's worked for me for years:
"Trust me: I'll let you know you when something's wrong."
Girl: What's wrong [you're not staying hard]?
HiFlo: I just busted twice! I'm not a goddamn machine. It's easier to receive than to give.
Girl: What's wrong [you're so quiet]?
HiFlo: I just feel like being quiet. Stop interrupting my silence.
Also memorize this line. It's worked for me for years:
"Trust me: I'll let you know you when something's wrong."