The only pronoun reference in the OP speaks of the friend’s mother, who is a “she”. This sentence is meant to convey that the friend’s grandparents gave birth to the friend’s mother in the brief (how brief?) time the grandparents were in Colombia.
I’m sorry, we seem to be getting far afield here. I really think we have very limited information presented here. However, I know that there is much depth to many stories. I am simply stating that while I would make this decision on other than strictly legal, technical grounds, I am suspending judgment since I do not have a full picture.
My posts (after the first one) have more to do with protecting my “reputation” (as not a slimy, “all that matters is the narrow technical/legal definition” proponent) than they do with helping the OP. I think there is no value in further debating. Perhaps PM if you would like?