Welcome from Blondie
As to your mother's desire not to be a grandmother in this system, look around the KH and circuit, are jws in general not having children or is it just the opposite. In fact, look at who get baptized. 80 to 90 percent are children of jws. There would be little or no increase especially in the US if jws stopped having children.
I remember my grandmother telling me about that thinking from Rutherford in the 30's and 40's. Then they changed their tune.
1938AD Advice: Delay marriage and children till after Armageddon???
1938 "Would it be scripturally proper for them to marry and begin to rear children? No, is the answer, which is supported by the scriptures....I will be far better to be unhampered and without burdens, that they may do the Lords will now, as the Lord commands, and also be without hindrance during Armageddon. … Those... who now contemplate marriage, it would seem, would do better if they wait a few years, until the fiery storm of Armageddon is gone." (Face the Facts, 1938, p. 46, 47, 50)
1941 Should men and women, both of whom are Jonadabs or "other sheep" of the Lord, now marry before Armageddon and bring forth children? they may chose to do so, but the admonition or advice of the scriptures appears to be against it. (Children; 1941; 3,000,000 ed.; p. 312)
1941 The prophetic picture seems to set forth the correct rule, to wit: The three sons of Noah and their wives were in the ark and were saved from the flood. They did not have any children, however, until after the flood. They began to have children two years after the flood. (Genesis 11:10,11) No children were taken into the ark and none were born in the ark, and hence none were brought out of the ark. Only eight persons went in and eight came out of the ark. (1 Peter 3:20; Genesis 8:18) That would appear to indicate that it would be proper that those who will form the "great multitude" should wait until after Armageddon to bring children into the world. (Children; 1941; 3,000,000 ed.; p. 312-313)
1941 "Armageddon is surely near, and during that time the Lord will clean off the earth everything that offends and is disagreeable. ... From now on we shall have our heart devotion fixed on The Theocracy, knowing that soon we shall journey forever together in the earth. Our hope is that within a few years our marriage may be consummated and, by the Lord's grace, we shall have sweet children that will be an honor to the Lord. We can well defer our marriage until lasting peace comes to the earth." (J. F. Rutherford, Children, 1941, p.366)
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w513/1p.159QuestionsFromReaders***Whether married couples in the truth want to have children or not is for them to decide, not us. Each couple must consider its own circumstances and its own purposes in view, and decide the matter and adopt a course and then take the responsibility before God for such course and its consequences. But we do unequivocally maintain that the purpose of marriage before God is the production of children, and hence if any married couples want children now, before Armageddon, that is perfectly proper and no one should criticize them for so doing, thereby meddling in their business. Neither should any be criticized for not having children, nor should we meddle in as to their reason why not. Private marital affairs are not the business of outsiders.
Children are not to be viewed as a hindrance to serving God and hence to be unwanted. Otherwise Paul would not have written, "She will be kept safe through childbearing." Nor would he have advised women under certain circumstances "to bear children". (1 Tim. 2:15; 5:14, NW) Under similar conditions his counsel applies today. If children come in the natural way according to which God instituted human marriage, then they are to be welcomed, even now, before the divine mandate is reissued to Armageddon survivors. You are grateful for having been brought into life, even within this present evil world, and so your children can be grateful for the same reason.