a ring doesn't plug a hole
A ring doesn't plug a hole is when a married woman is still looking for more than one man to plug her hole.
She got a ring, but now she's seeing two guys at the same time. I'm not even sure who she's with.
My sister got a ring, but now she's got a new boyfriend and a new tattoo.
He proposed, but now she's got a new guy in the house. The new guy's got a new ring.