Here is my family tree!

Me either. In fact when I play Sims3 I tend to just stick to one sim at a time. The 5th gen is the highest I've gotten with Sims4. I like your family and good luck with them.

Way to go. I've never gotten to 4th gen, I just can't let go of my first/founder sim.

On the subject of family trees I just thought to mention, for those who might be interested, that MCCC provides the facility to export a Sim's family tree in standard gedcom format for genealogical software.
I've tended only to play single Sims so do not have any personal experience of using gedcom but it might help keep track of large family trees.