My ex wife got fat when we were married. Only took her like two years. Orca fat. Again, no shame. I was still willing far more often than not.
So we separate, then divorce. However, b/c we are whores, we continue a physical relationship (don't recommend). Ultimately I meet the next wife and cut if off.
Fast forward one year. See pics on FB of her in some kind of steamy glamour shot thing (professionally done) of her on a bed in a man's shirt, playing with a tie but clearly down about 75 lbs. I'm like, WTF? But let it go. However, she keeps texting, calling, etc (i was dating the new wife) telling me about all the dudes she's been with recently and trying to get me to continue the physical part.
Luckily I was dating the new wife. I am not above weakness.
My point is, the ex was a whore, which has it's time and place. But she is still a whore. Perhaps you've dodged a bullet. Maybe your ex would always have one foot out the door and you'd have to worry about that shit forever.
If you've read this far, please note none of this matter with a cougar. They can be a whore, and it's totally fine. They can't even get preggers anymore. Think about it.