You say the family tree I pulled up is correct.
It says Marie's father is:
Ole Kristian Larsen b 15 Dec 1866 in Norway.<-------------------------- YOUR Ole Kristian Larsen
The above Ole DOES NOT MATCH the family thoraway found in Norway. Not at this point.
The family thoraway found is an excellent candidate to be your family - and it could be your family - but aren't you curious as to how the connection is made? Something is missing.
See #117 in the following church book record,
Østfold fylke, Sarpsborg, Ministerialbok nr. 1 (1859-1868), Fødte og døpte 1860, side 28. http://www.arkivverket.no/URN:NBN:no-a1450-kb20060320040867....
Born 02 November 1860 and baptized 26 December
Ole Christian [legitimate child, born within marriage]
Father Lars Petter Olsen
Mother Olea Marie Eriksdatter
It's just possible that a second child Ole Christian could be born to the same couple in 1866, especially if the first Ole Christian died.