Lars Hansen & Sigrid Knudsdatter Loven

Back again, this time digging into the immigration of my 5x great-grandparents, Bottolf Sjursen & Kari Eriksdatter Brekke, and their family. The emigration record of them leaving Norway includes their family, and farther up on the page, Lars & Sigrid and their family. The immigration record of them arriving in Quebec (Monsoon, 1866) has Kari and her family on one page, and Bottolf on the very next page, listed as the father of Sigrid’s family. Lars Hansen is nowhere to be found upon arrival. After doing some digging, I discovered that there was one death on the voyage and I am pretty sure it must’ve been Lars. And yes, Bottolf was married to Kari, and Lars to Sigrid. Nothing out of wedlock or an affair to my knowledge. Bottolf and Kari were in their 60’s at this time, while Sigrid and Lars were in their 40’s. Just looking for some context as to what may have happened, or does my story add up? Thanks for anything!