When God decided Adam needed a companion animal there was only a single human in all creation. We are not told in what order God presented each new creation to Adam but we do know that he rejected the spotted hyćna, the hippopotamus, the flea, the mastodon, the swallow and the dog.
GENESIS 2
18 And the LORD God said, It is not good that the man should be alone; I will make him an help meet for him.
19 And out of the ground the LORD God formed every beast of the field, and every fowl of the air; and brought them unto Adam to see what he would call them: and whatsoever Adam called every living creature, that was the name thereof.
20 And Adam gave names to all cattle, and to the fowl of the air, and to every beast of the field; but for Adam there was not found an help meet for him.
KJV
Eventually God decided on
PLAN B and produced a companion animal meet to helping Adam. It didn't have a name at this stage of course, and when you think about it no name was necessary. Noble Adam could hardly be addressing anyone else when requiring assistance with the task at hand could he? All the intended helpers had failed his visual inspection, or other criteria (they are not specified), but although Adam knew it had been taken from him I must point out that this second attempt at a helper meet for Adam did not itself get any choice in matters of companion.
PLAN B
21 And the LORD God caused a deep sleep to fall upon Adam, and he slept: and he took one of his ribs, and closed up the flesh instead thereof;
22 And the rib, which the LORD God had taken from man, made he a woman, and brought her unto the man.
23 And Adam said, This is now bone of my bones, and flesh of my flesh: she shall be called Woman, because she was taken out of Man.
24 Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.
25 And they were both naked, the man and his wife, and were not ashamed.
KJV .. look up
If your husband had a brother he does have an obligation to produce children by proxy. Without disobeying secularist laws, should he command your assistance in any such matter as The LORD lays upon his heart it is meet that you do as he commands in obedience to him as he is to The LORD and with your own companion animal it may be that your time is not wholly at his disposal. Your existing children would need to die first, but that can happen at any time due to an oversight on your part or on the part of your parents or grandparents or great-grandparents or even back to the tenth generation for example an illegitimate birth in the late 1600's could do it.
This is something which needs to be considered when deciding about pets. The Pastors will be happy to advise you I am sure, if you would like to book an appointment just contact Miss Cookie in the office and she'll let you know who is available.
I hope that is helpful.