Responsa for Bava Batra 102:3
שאני התם דלא לישוי איניש עבד לוה לאיש מלוה
'If a man borrows money from his slave and then emancipates him, or from his wife and then divorces her, they have no claim against him. What is the reason? Is it not because we say that he merely wished to see if they had any money?' — These cases are different, because we presume that a man would not readily place himself in the position of 'a borrower who is a servant to the lender.' Rab said: If a man sells a field to his wife, She becomes the legal owner, but he is still entitled to the produce. If he makes her a gift of a field, she becomes the legal owner and he is no longer entitled to the produce.<span class="x" onmousemove="('comment',' Because it is assumed that a gift is given without reservation. ');"><sup>4</sup></span>
Teshuvot Maharam
A. If the money is in the hands of the depositaries, they must return it to A, since the latter entrusted his business to his wife. If, however, the money was returned to L and she claims that the money belongs to her, since it had been originally given to her on condition that her husband have no rights thereto; or that the money belongs to a person, D, who lent it to her, she may take an oath to support her claim and retain the money. Although a husband may not exact an oath from his wife regarding her management of his business (Ket. 88a), this rule applies only to the case where the husband is not positive in his claim.
Q. A left his wife L; and while he was away, L borrowed money for the sustenance of herself and of her infant daughter. A now refuses to pay the debts she thus incurred.
A. If L will take an oath to the effect that these loans were made to her with the expectation that she would personally repay them and that now she is unable to do so, A will be obliged to pay these debts. For a husband must provide for the sustenance of his wife, and of his children until they reach the age of six.
Q. L contends that A beat her. A denies this charge, but admits having left her without her consent. She now refuses to live with him unless he make a solemn promise, obligating himself by a herem, and drawing up a document to the effect that… [reference is made to the details that were enumerated in the inquiry, which was written on the other side of the parchment].
A. A must comply with L's wishes or divorce her, and pay her the ketubah; for a husband must honor his wife and not degrade her.
SOURCES: Am II, 24.
Maharach Or Zarua Responsa
The residue of the estate must be divided among the heirs. X, however, is no longer responsible for the share which he swore that he gave B. X must allot A and the other heirs, their rightful share of the estate. In any event, A has no grounds for complaint against B, concerning the latter's share.
However, further study and thought on the subject, would be required if X were to demand that B return all money that was in excess of the latter's rightful share of the estate.
Teshuvot Maharam
A. A's wife had no right to promise a dowry or give anything to B or C without A's permission. Her promises and gifts were, therefore, void and B must return to A the valuables A's wife had deposited with him.
SOURCES: Pr. 858.