That's great! So the 90 year old must have been born when her father was around 63, whilst the 100 year old was born to a younger father and is it probably unlikely that their combined figure will reach 153.
One of my ancestors had his first child at age 58 and five more until he was nearly 70, but none were especially long lived.
Sorry, I've realised that there is something I missed out though:
I mean't to put "child who died before the end of the C19th", so that we can somewhat discount the effects of modern medicine.
(I've now amended the post)