I’m not female, but I’d like to share with you a piece of advice. Before you travel have the father of these children put in writing that he is aware that you’re traveling with the children. Some airlines and IOs are strict on this - to prevent child trafficking. I advise you have this letter handy, just in case you’re asked for it. My wife almost missed a flight out of Canada because of this.
Again, I’m not female but thought you’d find this information helpful.
All the best.