Say " Drop your stuff off anytime - no trouble for me "
She is looking for some feel on your feelings. She aint let go, she needs to know that you still care and what a better way to gauge that than evoke an emotional response.
Why is she in so much contact with you ? Go dark SP. Let her wonder. You say you co parent 2 kids but in all your previous posts you emphasis that you are the main parent. That being the case unless it is of utmost kids business, dont respond.