@YaMuvva I am sorry if I missed this and someone already asked but do you know if B has her own back garden? You said in one of your comments that you have a large back garden, and so if B lives near you, I am assuming she lives in a similar home and has her own back garden or even front garden?
The point I am making is that if B has her own garden space, she can transplant her crops into raised beds, containers, etc. and continue with the growing season.
I just am a little confused at why so many posters are saying how this is unfair to B, when you are the new owners, and you deserve total access to the land you have purchased and it is up to B to find a way to continue her love of gardening on her own land.
But, if B does indeed have her own garden then maybe a good will gesture, could be to gift her with a growing container of some sort?