Your story is pretty good.
I'm not a big fan of Immortal Dynasties in Sunset Valley, as I predicted who would be the husband and who else would be moved in - It's always Agnes and Christopher, because Agnes is rich and can paint portraits off the bat and Chris(which is my first name by the way) has a LTW to have 13 perfect fish in fish bowls and is an Angler, so he can get Deathfish quickly.
Please do not take this the wrong way, you're doing great. But I find Sunset Valley Immortal Dynasties sort of cliche. I am not saying all of the cliches are bad - Pam's Immortal Dynasty founder married Christopher and did it in an interesting way, and Metropolis Man(who created the rules for the Immortal Dynasty) married in Agnes but didn't have his founder have a baby with her. Just go with what you like. The part where you had a hard time moving Christopher in was amazing. I really do not like the fact that the game assigns pre-made Sims to jobs in the consignment store and festival booths because they work all day and you can't invite them over until late at night when their needs are failing.
(Just be glad it's not somewhere like France or Egypt where they work 24/7 and you have to romance them and then invite them over to your house to marry them!)
Anyways, I wish you great luck in your Dynasty and can't wait to see Isabelle(checks) ooops, sorry but it seems you didn't update your progress post on the first part because Izzy's already Immortal.
And I think I figured out the name scheme. I won't say for fear of spoilers, but... check out the first letter of each name.