Work and Alimony

I have been a stay at home mom for the past 16 years. We are trying to work things out (spouse was the one that mentioned divorce). I want to stay optimistic, but I also have to look out for myself and the kids.
If I accept a job offer (while we are still married), and spouse decides definitely on a divorce months down the road, will me having a new job affect alimony that would be due to me since I agreed to stay home and be with the kids for so long? I want to have my own money in a private account just in case…but I also want to protect us…just in case.

Also, is there anything else that I should be doing, without my spouse knowing, to protect us? I do not want us to end in divorce, but again, I’m looking out for myself and the kids.

Alimony is paid to maintain your standard of living, and if you have an income then you will need less money to maintain that standard of living. So, yes, if you work then the income may affect the amount of alimony you receive.