The way the item is worded, it's hard to be sure if it means each actress had her own spin-off, or if both actresses were in the same spinoff. Either way, I'm stumped. I started thinking about Golden Girls/Golden Palace, but Betty White, the only surviving Golden Girl, never remarried after husband Allen Ludden died in 1981 - years before the original GG series began. Plus, by all accounts I've seen and heard, she and Mr. Ludden adored each other.
The Mary Tyler Moore show also crossed my mind, but Rhoda actually ran for 5 seasons, so that wouldn't count as a short-lived spin-off... 🤔