The 1652 birth year for Mari appears unsupported. Although I'm not aware of any surviving baptism record for her, I think her likely birth date is just a bit before 1670.
Her son Anders (possibly not her last child, as it's unclear where the daughters are in birth order compared to the sons) was roughly 1708 based on his age 49 at death in 1757. The current profile here for daughter Gunhild has 1710 (sources unclear). That would suggest that Mari was born after about 1665 (which would make her 45 in 1710). On the other hand, if the 1692 birth year for Peder (the second son) is correct, and given that Ola's first wife died about 1688, their marriage (and birth of their first son Gul) would have occurred about 1690. That would make her 20 at marriage if she was born in 1670; 21 or a bit older might be more likely. But the likely range is 1665-1670.
Mari is the last of 8 children of her parents in probate records. If she was born about 1669, with 2-year gaps between children that would have her eldest sibling born 1855; about right if her parents were born around 1630 (though they could be born quite a bit earlier with longer gaps between children and/or a later marriage). Looking at the profiles here, there are no good sources for birth years on this line and it's all similar conjecture. But 1652 just doesn't work with the known information, making her 55 or older for the births of her later children.