You are entitled to a portion of her retirement for just the sacrifices you describe. It's the law. It's not a gift or theft from her.
Without you, who knows if she would be a mother at all? And how would the children be turning out if you had worked full time at a high level job with long hours?
Without you, would she have attained her rank, or even make retirement at all?
I think the appropriate words you can say are, "you're welcome."
M: 57 H: 60 M: 35 yrs S30,D28,D19 H off to Alaska 2006 Recon 7/07- 8/08 *2016* X = "ALASKA 2.0" GROUND HOG DAY I File D 10/16 OW DIV 2/26/2018 X marries OW 5/2016