According to Tattvārtha Sūtra and Jain doctrine, you cannot expect to meet your mother in Dev lok as the same human family relationship.

In Jainism:

• After death, a soul takes birth according to its karma.
• In Dev lok, the soul is born as a deva or devī, not as a human family member.
• So your mother’s soul may also be reborn there, but not as “your mother” in the earthly family sense.
• The old worldly relationship of mother, father, son, daughter does not continue in the same form in Dev lok.

So the correct understanding is:

• Possible: the same soul may be born in Dev lok.
• Not possible: meeting her there as the same family member with the same earthly relationship.

In Jain view, all such worldly relations are temporary and karmically bound. In Dev lok, beings remain as separate celestial souls, not as a continuing human family.

If you want, I can also explain this according to specific Tattvārtha Sūtra gāthā / adhyāya in simple language.