Is it permissible for Zayd to return to his wife, Aisha, after he divorced her with three separate pronouncements during the same period of purity, and then had intercourse with her after the first pronouncement?

If what is mentioned in the question occurred, then it is necessary to consult trustworthy scholars or specialized authorities like Islamic centers, due to the presence of ambiguous phrases that require clarification. In general, a husband's divorce pronouncement is effective, and his intercourse with a revocably divorced wife during her 'iddah (definition) is considered a valid return (raj'ah) by some scholars, even if he did not intend the return. His divorcing her during the period of purity in which he had intercourse with her is considered an innovative divorce (talaq (definition) bid'i) and is effective according to the majority of jurists, which is the more preponderant opinion. If he combined the other two pronouncements in a single utterance, then they are considered two pronouncements according to the majority, unless he intended to emphasize the first, in which case it is considered a single pronouncement. Ibn Taymiyyah held that only one pronouncement occurs. It must be noted that it is not the children's right to pressure their father to divorce his second wife; otherwise, they would be acting improperly and might fall into disobedience to parents.