I have two female black widow spiders living in my window well. I noticed them about three weeks ago, but they've probably been living there quite a bit longer than I've been watching them. The window well is about 10 square feet, and they both definitely know that the other exists. They don't seem to be aggressive towards each other. I always love watching the black widows that build webs near my house in the summertime, but I've never seen two choose to live so close to each other. Is this normal? I can't find anything online.