Does the fasting of one who committed sodomy in Ramadan, but is regretful of his act, become invalidated?

Sodomy is one of the major sins, and a crime for which Allah punished its people with destruction and annihilation. Its sin becomes even greater during the daytime in Ramadan if a fasting person commits it. Whoever commits this must offer sincere repentance and seek forgiveness. He also owes an expiation, which is: freeing a slave; if he cannot find one, then fasting for two consecutive months; if he is unable to do that, then feeding sixty poor people.