A number of reasons. I don't believe they resemble each other at all. Now that could be a limitation or something that was over looked. But to quote Scarface. "The Eye's chico... they never lie" Stephen has Brownish eyes and Jade has Brown eyes. Tybalt in normal lighting has greyish blue. Stephen is pale white and Jade has a very tiny tan. Tybalt straight up look like a different ethnicity all together.
I'm not sure how old Jade is exactly but if I was to guess somewhere between 35 to 37 and I would put Tybalt older than the MC since he's not a freshman let's put him at 20-21 to be safe. Based on this Jade would have had Tybalt from 15 to 17.
It was a joke about Tax fraud
![KEK :KEK: :KEK:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
But my point stands I find it hard to believe that they are donors.
Personally I see an effort to show the difference in wealth between people that are married compared to those that are either single or by themselves
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.