Hi,
Thanks for contacting Just Answer medical experts with your question,
Given her age and weight, her Blood Pressure is at present not worrisome in terms of possible chances of any complications.
More aggressive control of Blood Pressure may lead to undesirable side-effects like dizziness, intermittent low BP etc.
Her slighlty higher BP could be the result of some age related kidney changes, her extra weight etc.
The good news is that with these kind of pressures she should live a long and healthy life,
All the best,
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Regards
Dr. Gupta