Alternate theory: Spencer raises Jack and Elizabeth’s kid

For a long time I’ve felt like Jack and Liz raise Spencer and Alex’s kid and that the generations are wrong but they keep it a secret because the modern Duttons seem more like Spencer and Alex. Lately I think it’s more likely that Jack dies. When I go over the character of Spencer i can’t imagine him letting anyone else raise his kid but I can see him sticking around and raising Jacks child and paying penance for abandoning the family. We know Spencer lives through the 20s and beyond and we know if we logically follow the 7th generation rancher claims (at least through the patriarchal Dutton line) then it must be Jack’s kid. Ive never expected Alex to live unless the studio is somehow able to strong-arm Sheridan but maybe she does and they raise the baby. I do think it’s weird to spotlight her nausea on a boat 10x larger than the tugboat and have it mean nothing but she could be pregnant too and there could be two Dutton kids. Not sure what happens to Elizabeth. I can see Jack dying and her telling him she’s pregnant in his last moments or her finding out soon after his death. I could see her dying in childbirth but that seems like ….a lot. It will give me the ick if Alex and Jack die and Spencer and Elizabeth wind up together.