All it means, is eggs are getting close. Close is not an exact time frame, generally when I have give up hope they will ever lay, they do. So hard waiting for that first egg. I am currently waiting for my older hens to start up again after the winter break.
As to the original poster:
There are 3 chickens in the coop, two are roosters
Not a good set up. I am assuming that they are all the same age, and just coming into their hormones. There is a real chance that the cockerels can really harass the pullet or fight themselves. You
need a plan B where you can separate the pullet from one or both of the roosters, set up and ready to go. Or to separate the roosters from each other. IT needs to be set up and ready to go, because it can get ugly real fast.
I would like you to consider removing from your flock both roosters. Especially if you have children under the age of 6. Roosters take a lot of experience in my opinion. And new people vastly underestimate the violence a rooster can produce. You are probably attached to both of them, but how they behave today, is no indication how they will behave tomorrow. I think you might be headed for a wreck.
I see you have more pullet chicks, and I assume you are thinking that more hens will make keeping both roosters possible, but that often is not the case. I hate to rain on your parade, but just want you to be aware, that this is not a good set up, and very likely going to get ugly soon. If it doesn't, you will have been very lucky.
Mrs K