First of all, keep in mind that I am unable to diagnose you because I am unable to examine you, this forum is for educational purposes.
Meningothelial meningioma is a typically benign form of meningioma, and is often completly cured by surgical resection. However, there are many cases in the literature when mengiomas are classified as a benign type and then are found to be aggressive, recurrent and metastatic tumors. I suspect that the headache that your wife had was due to the venous obstruction caused by the menigioma, and recurrence of the headache might be related to further venous obstruction. Alternatively this headache may be unrelated, but I would suggest a repeat MRI to make sure. I would suggest an MRI of the brain with GAD contrast and a MRV (magnetic resonance venogram).
I hope this has been helpful.
Another MRI would probably show if there is a re occurance.