Will they be couple/love interests in the future? We don't know, also check this
https://x.com/hootakuarchive/status/2032696261560942838
Where did Zig say that they are alphas and what kind of alphas? I can't remember her mentioning the secondary gender of the children. I know she was toying with the idea pairing them, because her readers are asking for that, but can't remember her revealing their secondary gender. The problem with them is that they can be everything, from normal to domaint, or beta.
Cecil actually hates crossdressing, he only does it for Josh and Spence.

What's up with the child joshua has? Like is the one wearing a dress a boy or a girl, what's their second gender. I know spence is an omega but what about Joshua's and Chase's kids, what's their gender and are there going to be any couple among them.