We arrived home after two weeks of camp to find that a family of black widows invaded our house. There were seven in all, four in our garage and three in the front patio. If you double clic on the picture, you should be able to enlarge the photo so you can see the red spot. The yellow blog is the crushed egg sac. Jon played with the spider before killing it. We couldn't get a good picture of it when it was alive.
We even saw eleven egg sacs. Hopefully we killed them in time.
It is true. The female is bigger and kills the male. I found this a few days later in a small metal area in our garage as I was closing the garage door. I am very careful now where I put my hands and anytime I am in the garage, I am looking for possible spiders.