In Jainism, yes, a woman can be born in a heavenly realm, but it is not guaranteed only by feeling sorry for past mistakes.

In Digambar Jainism, the important point is:

• Karma is bound by actions, thoughts, and intentions.
• Sincere repentance is good and spiritually important.
• But repentance alone does not erase karma immediately.
• To purify the soul, one should:

- stop repeating the wrong actions, - do pratikraman, - accept the fault honestly, - take small vows or firm resolutions, - practice ahimsa, satya, aparigraha, - and live with right faith and right conduct.

About heaven in Jainism

• Heaven is called deva gati.
• It is a temporary good rebirth, not final liberation.
• A person may go there due to good karmas and pure mental state.
• But for moksha, one must destroy all karmas through Jain path.

For a person who has done many sins in the past

Jainism says:

• Past karma can be lightened by repentance, restraint, penance, and a changed life.
• If the remorse is truly sincere and the person does not continue the same sins, the future becomes better.
• A female birth does not stop spiritual progress in Jainism.

Simple truth

If you truly accept your mistake, feel deep remorse, and start living according to Jain principles, that is spiritually meaningful. But heaven is not promised just by confession; it depends on the overall karma and future conduct.

So, in short: yes, it is possible to get a good rebirth including heaven, but sincere repentance must be followed by real change and Jain practice.