Interesting memory...
I bought a trio and kept them separate from the rest of my ladies. All my roosters are in a stag pen, next door to the hens. One of the hens in the trio started moving towards all the other hens to become part of the larger flock EVEN though there was NO rooster residing with them.
After dispatching the male in the trio, the hen that gravitated to the larger flock instantly moved in with them. The other was shyer and got moved.
Not a single one of my hens or pullets tries to get into my rooster pen for mating opportunities. Though there will be occasional flirting and courting through the fence, it isn't a ton for how many birds I have.
Maybe it's simply a case of safety in numbers. Anyways, so many different chicken personalities... who can tell what any individual is thinking. But peer pressure is real... monkey see, monkey do. Ones who are content to stay will learn the bad behavior from the perpetrator... things like hiding nests and hopping fences or in this case wondering toward the other flock sounds.