Answer

If a shravak deliberately indulges in maithun during samayik, it is considered a serious violation of samayik vrata. The proper response in Jain Dharma is:

• Immediately stop the fault
• Do pratikraman
• Offer sincere repentance
• Say “micchhami dukkadam”
• Take suitable prāyaścitta from a guru or an experienced Jain guide

There is no single fixed punishment for every case. The prāyaścitta depends on:

• whether it was only a thought,
• whether it was intentional,
• whether it involved physical action,
• and the person’s level of vow and conduct.

Explanation

In Jain Dharma, samayik is meant for:

• equanimity,
• self-control,
• soul-awareness,
• and freedom from passions.

So if maithun happens during samayik, then the samayik is defiled by that lapse. The fault is not just external; it is also internal, because Jain ethics gives great importance to:

• man — mind
• vachan — speech
• kaya — body

If it was only a mental inclination

If lustful thoughts arose briefly, the remedy is:

• immediate awareness,
• repentance,
• pratikraman,
• and renewed resolve.

If it was deliberate physical maithun

Then it is a much more serious breach. In such a case:

• the samayik is considered spoiled,
• the person should not hide the fault,
• and should seek appropriate prāyaścitta.

What kind of prāyaścitta may be given?

Traditionally, depending on the guru and the severity of the fault, penance may include things like:

• extra samayik
• pratikraman repeatedly
• upavas or aayambil
• recitation of holy prayers
• service and humility
• strict self-restraint for a period
• confession before a qualified spiritual guide

But the exact penance is not same for everyone. Jain Dharma does not encourage self-made punishment; it encourages right repentance and proper guidance.

Spiritual Understanding

The purpose of prāyaścitta is not humiliation. Its purpose is:

• purification of the soul,
• weakening of passions,
• restoration of self-control,
• and return to inner purity.

In Jain view, the real loss is not only the external act, but the bondage of karma caused by passion. That is why sincere repentance is very important.

If a fault happens, Jain Dharma teaches:

• do not justify it
• do not hide it
• do not despair
• repent sincerely
• resume the path with discipline

Takeaway

If maithun occurs during samayik, it is a serious fault and should be treated with repentance, pratikraman, and suitable prāyaścitta. The exact penance should be taken from a qualified Jain guru, because Jain Dharma gives prāyaścitta according to the nature and seriousness of the lapse.

If you want, I can also explain the difference between pratikraman, alochana, and prāyaścitta in simple Jain terms.