i'm not sure of the order you put , for the crib i needed first to date beth to unlock sumon quest, then talk to everi to unlock the possibility to learn sumon spell and the option to build a crib because it's what she asks in exchange of her teaching the mc the spell.
i had all the materials but i could not just build the crib just like that since there was no option to build it and no light marker. also everi never asked the mc to build the crib she just stayed in bed with no dialog option except "nevermind" and "want to have sex", until i got the sumon quest after dating beth.
i could not build a crib before having a date with beth. since everi even never asked for it and also no marker to build the rib.
Check your quest log for "A Date With Beth," either started or completed. Erevi will give birth after "Restore The Temple" is done, but there's no option to learn the spell/build the crib until after "A Date With Beth" has started.
The sequence is:
0 Restore The Temple
1 Ask Beth out to start the need for Summon.
2 Ask Erevi to teach you, build the crib, she teaches you (make sure you have a crystalized egg for that).
3 Take Beth on that date.
4+ Other quests that rely on shapechanging can now be done.