What is the expiation for exchanging kisses and embraces with a divorced woman, and is repentance for that accepted?

Repentance is accepted from whoever performs it fulfilling its conditions: abstaining from the sin, resolving not to return to it, and regretting it. Allah is Forgiving and Merciful; He forgives all sins, and "the one who repents from sin is like one who has no sin." Therefore, be sincere in your repentance, humble yourself before Allah, and increase in good deeds. It is also recommended to hasten to marry whenever possible.