According to Jain सिद्धांत and the Tattvārtha Sūtra, it is possible in a very limited sense, but not as a guaranteed family reunion.

In Jainism:

• After death, the soul takes a new birth according to its own karma.
• In heavenly realms (devaloka), beings do not live with the same earthly family relations in the same way.
• So you may be reborn in the same deva realm as your mother if karmic conditions align, but there is no certainty that you will meet her there as “mother and child” in the earthly sense.
• Also, relationships in heaven are karmic and temporary, not permanent bonds like we imagine on earth.

So the Jain answer is:

Possibility: yes, by karma it may happen. Guarantee: no. And even if it happens, the relationship will not remain exactly as it was on earth.

In Jain thought, the highest goal is not reunion in heaven, but moksha, where the soul becomes free from all karmic bondage.

If you want, I can also explain this according to the Tattvārtha Sūtra view of gati, deva-gati, and rebirth in simple language.