Gene Simmons and Shannon Tweed Gene Simmons and Shannon Tweed

Looks like Gene Simmons is finally ready to take the plunge.

The rocker, who has vowed never to get married, all but proposed to longtime girlfriend Shannon Tweed on Gene Simmons Family Jewels earlier this month ("We could elope") and wants to make it official on Tuesday's season finale (10/9c, A&E).

Gene Simmons' Family Jewels gets real

"I thought it was time she made an honest man out of me," he explains to their daughter, Sophie, in the exclusive clip below as they check out rings.

He then takes Tweed, who he's been dating for 28 years, to Belize to pop the question. We don't see her answer, but we have a pretty good guess.