Oh, yes, I had a memory where I learned that. [it's hard for him to keep track of who knew what anymore, everyone was so involved in each other's lives at this point.] I suppose it's entirely possible Alfendi was adopted too but I'm not sure.

Yes, he seems to be, by at least a decade if not more. It's a little hard to tell how old he actually is though- I think he may be older than Ema and Jake at the very least.