Long Term Tenant wants to invest in upgrade

[Michele Galloway]

I have a tenant that has been renting my house more than 10 years.  This morning she asked if she could put a plexiglass shower door in the bathroom.  I am not good with that.  It is not her house and I don't want her thinking she can just make changes in my property on a whim.  My response is for her to send me what is looking at.

I'm worried this has legal ramifications and wanted to ask the community if they have ever had this issue.