Anna, the oldest sister of Paulina

Since reading Grandma's book many years ago, I always wondered what had happened to Anna the oldest sister of Paulina, Grandma's mother. Well, because of the current access to records that we now have that Grandma didn't have, we now know that there was a different story that played out in Anna's life. It is basically bits and pieces that I have tried to put together from census records, etc. Here goes~
Anna is listed in the Norway census and in Grandma's book, as Ane Johan. But in the census records found here in the U. S., she is listed as Anna. Grandma states in her book, "It was about 1867 that Anna, then 19, met the young minister, Carlson, who she soon married. They went to live in Atlantic, Iowa, where Carlson had been given a pastorate. There they remained all their lives."
I can not find any kind of a marriage record for Anna but now know that her husband's name was Charles Carlsen. They lived in Illinois from 1869-1873 and had three, possibly four children. They are listed as, Olga~ born in 1869, Victor G~ born in 1871 and Alex born in 1873. There are no birth records found, all of this information was taken from census records. In 1875, the family of five are living in Albert Lea, Minnesota. Charles is 33, Anna 27, Olga 7, Victor 4 and Alex 2. They are also there in 1880 and 1885 census records, excepting Alex who most likely died prior to 1880, and now Charles' older sister Julia is living with them. This seems to have been the custom back in those days, having widowed parents or spinster sisters living with the family. I wonder if Julia liked the living arrangements or maybe had no other means of support, the latter probably the case. A little note, in the 1885 census in Albert Lea, living with the Carlsen's is Lester Woods, age 8 who would be Anna's sister Christina who died in 1880, son. From Grandma's book, we know that Lester Woods was raised by Aunt Sophia and Uncle Frank in Minneapolis and they who treated him in every way like a son.  So from this I am thinking that Anna did have contact with her sisters but this was quite a bit earlier than when Grandma was born in 1894, so she wouldn't have known some of the details surrounding the other sisters. How long Lester was there or was he just visiting I'm not sure. Anywho, the next record is the 1895 census and the Carlsen family are now living in Cass, Iowa. Charles is never listed as a Pastor in any of these records, his vocation is listed as a farmer and carpenter.
In 1910, Anna 61, is a widow with Olga, 41 and Victor, 38 listed in the same household. From the records, we see that Victor is an Electrical Engineer working in the light plant. Neither of these two married. On January 13, 1920 the census record lists the three of them in Cass, Iowa and now Victor is working as an Engineer for the Waterworks plant. This must have been shortly before Anna's death as we read that she and Aunt Hanna both died on the same day in January but date unknown. I see no other record for Victor beyond the 1920 census, but find Olga at age 71 in 1940 continuing to live in Cass, Iowa and then nothing beyond. I wonder what their lives were like back there in Iowa and who missed them when they were gone since they had no children to look after them in their old age. It make me wonder.