The season premiere of Gene Simmons Family Jewels saw Tweed leave Simmons after growing tired of the Kiss bassist frequently being photographed with other women.
The former model later stormed off a televised interview with Simmons on The Joy Behar Show, referring to the musician as a "pig" before leaving the stage.
Simmons has now described the state of their romance as "touch and go", but insisted to Lehigh Valley Music that he is attempting to change his behaviour towards women.
"What happens when you cut yourself and it bleeds? Does it heal right away, or does it sometimes get infected and gets worse… Women are basically living with Jekyll and Hyde when it comes to men. Men are always on their best behaviour for women, and they don't really get to see what's under the skin. 'Cause what's under the skin is testosterone," he explained.
"The tendency of guys is to do all kinds of stuff that [angers] women. And so when they really peel off the outer skin of the snake, they get the snake. And that's not easy to take."
Simmons and Tweed have dated for more than two decades, but never married. They are the parents to 22-year-old son Nick and 19-year-old daughter Sophie.
Gene Simmons Family Jewels continues with new episode 'Mr Tweed Goes to Canada' on Tuesday at 10/9c on A&E.
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Watch a clip from Gene Simmons and Shannon Tweed's confrontational Joy Behar Show interview below: