[Benn Roe]

You weren’t aware Cyclops and Jean had another kid from the future? That’s Rachel Summers (or sometimes Grey), aka Phoenix, their original kid from the future, who was a mainstay of Claremont’s 70s X-Men comics (first appearing around the time of Days of Future Past), 80s and 90s Excalibur, and many major X-Men teams since. Not trying to belittle you or come across elitist, but I’m pretty baffled that you could have read almost any other X-Men comics without being familiar with her. Aren’t the 70s and 80s the era you’re most familiar with, from omnibuses? Her character predates Cable by 15 or so years.

Jubilee’s kid, Shogo, is adopted (or, more accurately, “claimed” or “kidnapped”, depending on how charitable you want to be). He’s not biologically related to her.

And, no, these comics haven’t been for kids since the 90s. Very few kids read comics these days, at least not super hero ones, and they’re now written by people who grew up reading them as kids, for people who grew up reading them as kids, very much an adult medium.