Bismihi ta'ala
This topic has been addressed a few times in this platform, and I recommend you have a look at previous answers.
Financial independence is not enough for her to not need consent in doing mut'ah. Please refer to the details of this.
Of course, besides the shar'i side of this, one must also look at the social implications, and it is very important to observe what would be good for her and her future.
And Allah knows best