Sketchy Neighbor...

So, we have an older single lady neighbor directly to the right of us (if you're looking at our house from the street). In November my mom was in town for Mason's birthday party and was outside with the kids, and she approached my mom asking HER if we could rake our leaves in our yard. We don't have that many leaves, and not everyone's yard is perfection in our neighborhood to her standards. I was BLOWN away she would ask my Mother that. Then, my mom told her that I am a stay at home Mom with 2 small children and that Jeff works A LOT (which she knows). She then proceeded to tell my Mom that if Jeff works then we can pay someone to rake them!?!?!?!

My mom being the non-confrontational person she is just said "ok" and came back inside to tell me. We did NOT rake our leaves, and now they are all gone because they have dried up and gone away due to the warm weather we have sometimes had.

Today, I get home from dropping Mason off at school and running errands and she was IN OUR YARD picking up sticks. I didn't realize it until I opened the blinds and saw her standing there.
I went out again and this is what I see in my yard.

That's right, a pile of twigs and sticks she decided to pick up and place in our yard... Does anyone else find this odd??? Please get a hobby sketchy neighbor!