I have a tenant that wont allow realtor showings

I am selling a duplex we have.  A tenant on one of the sides refuses to allow realtor showings stating that she does not feel safe having someone enter her home that she does not know, I believe this is an excuse since she and her boyfriend are always home when I have been working on the property.  I have even offered to drive over and make sure there are no issues when we have showings.  Her lease explicitly states we are allowed to show the unit with 24 hours notice.

I plan to drive over and allow her to break her lease without any penalties if she feels unsafe that we are selling the property.  The last thing I want to do is make someone feel unsafe in their home.  Though it would just be a licensed realtor and a preapproved buyer entering...

I think I uncovered a black swan when she mentioned that she doesn't want to help anyone's bottom line.  She doesn't know that I own the property, I just ignore my title and they think I'm the handyman.  Curious about what people would do in this situation