That's still a serious and very obvious conflict of interest.
The PA lawyer's position is that of the Estate's Executor, it is his responsibility to control the disbursement of the Estate's funds. I would interpret the statement 'he must represent her in regard to her money' to mean he must comply with her instructions for disbursement of her portion of the Estate as long as those instructions are appropriate in terms of the Will and the state laws.
Here in the US, some states have statutes that state a person under the age of majority are not allowed to control their financial affairs. Their parents or guardians control the child's finances and if Pennsylvania is such a state, then the lawyer's actions were appropriate prior to Chrissy reaching her age of majority.
The problem I see in the story is that the PA lawyer put the money in an escrow account. As the Executor, the lawyer must maintain control of the money in the escrow account until it is disbursed to Chrissy. The account should be in Chrissy's name, but her parents should not be on the account as signatories with the authority to disburse the money. Therefore, the PA lawyer telling her parents to pay the lady would not be appropriate.
Since Chrissy is 19, the PA lawyer should have turned control of the escrow account over to her when she reached 18, assuming that the Will's terms did not dictate a different action. Once again, it seems that different states have statues that define whether a person preparing their Will has the right to control how their assets are to be disbursed after their death. I believe most states' statues say that the assets must be turned over to the adult inheritors once the court approves Probate. For children the situation is different. Assets are to be held in trust unless an alternate disbursement of assets is approved by the court, and when the child reaches the age of majority, the assets must be released to the child for they are now an adult. Which means the PA lawyer was required to release the escrow account's assets to Chrissy when she turned 18.
Since there is no apparent reason for the lawyer to have not released the funds and many reasons why he should do so, the lawyers actions lack credibility.