Wait hold on a question so a alpha girl can get a omega boy or a omega girl pregnant? And a alpha cant get pregnant right only a omega can get pregnant from a alpha? And a beta cant have a kid either if its correct, so any pairing is ok like alpha be with alpha or omega - omega , beta omega or beta and And beta as couple to have sex?
There are 6 Miller children. Nathaniel (his partner is the Beta lawyer Chrissy Jean), Grayson & Stacy(twins), Chase, Larian and Bliss. Of these Stacy and Larian are Female dominant Alphas. I don't know if the author will ever publish their stories as they haven't written any Yuri yet. And Bliss is a Dominant Omega (his story is currently ongoing). And Keith has, I think, 4 half brothers which, including him, were birthed by his omega parent Angel and the 5 dominant Alphas who bought and captured him. Their stories will be published soon too.
Understood 6 miller kids, cool a Alpha can be together so his partner beta has a bite mark? So 2 girls alpha nice i see no storys yet from author. So bliss a dominant omega did he ever mark his partner too? And how can 2 dominant can be together? Oh no with keith and his parent angel bought him and captured no way so sad to hear and 4 halfbrother cool more storys soon
What we know it that Bliss is 17 when he was "send" to England, his pair Cassian is ~12 years older. Nathaniel is a year older than Cassian ( at least he is one year ahead in college), the twins (Grayson and Stacy) are younger than Cassian. Chase is younger than the twins, but between him and Bliss is Larien. My guess is that Chase is early 20th to 25. Josh is ~5 years ( the author probably changed it to 4, not sure) older than Chase.

Btw how old are chase and josh?