That makes no sense whatsoever. It would be [Age of MC]+10+2(ish - really - nearly 10 years to take a photo? The money was already there). So 16+10+2 for MC.
[AoMC+9Mo] for Ds.
Such that, should MC be 16 (for sex + driving), + 9 months, + 10 years, + 2 years rehab and business setup, Ds should be 17.
*I don't know the age where you are for leaving school / getting learner's driving licence, but based it on Europe)
Going back through my maths, we agree. Except MC is 28 by my maths. I apologise!
You don't learn photography and get rehabilitated and being one of the best in your job in 2 years.
After coming out of a coma that lasted 10 years it would take you a min of 2 years to even be able to walk on your own.
Just to get your muscles going and building strength would take you 2 years.
So I am seeing that MC taken 4-8 years to get rehabilitated and learn how to do photography and to make a name for himself that gets top jobs like it said then he has worked some in the business to get there.
In the USA you can get a full driving licences at 16 yo. (Not in all states but in most you can.)
The 9 months is part of the 10 years.
So once again I see MC at age 16-18 + 10 years coma + 6 years to get rehabilitated and learn how to do photography and to make a name for himself so were looking at age 32 - 34 at the min for MC and that would be the min age for the girls to be in this VN at 16-18.
In the VN it says the girls look younger than the mother when the MC met her and got her pregnant so I put MC at 18 plus the 16 years so age 34 now.