No...other spiders, pillbugs, ants etc. It's a 50 year old house on a concrete slab foundation that has minor cracks (any 34' square concrete pad will crack over time) and we have had ants coming up through the slab since forever.

We didn't know about the widows at first. Killed spiders periodically like anybody else would. Then one day I was preparing dinner and caught movement out of the corner of my eye. Saw a spindly leg peeking out from underneath the kitchen cabinets, right above my foot. That turned out to be an adult female, stereotypical size - abdomen about the size of a chickpea, legspan about 3".

After that I photographed the spiders I found. The next day I found two small brown spiders with patterned round abdomens. Like the stereotypical black widows, the frontmost and backmost legs were longest and the middle legs much shorter. They had whitish hourglasses on their abdomens. one two

They don't look like your stereotypical widows but they are.. just juveniles and I believe the 2nd is a male. example male widow (not from my house)

A few days later I was on the phone with my mom when my 2yo came running, yelling about a spider. I found this under the table. I could see a web behind it but it was evening and it was dark in the corner of my dining room. I couldn't see much behind the table so I took some flash photos and went to the computer....

oh

oh god

fucking fuck

FUCK FUCK FUCK

(That is a female obvs, juvenile, abdomen about the size of a typical pillbug.)

So at this point I knew the source of the widows. Called pest control that night.

Later that night found this in the laundry room. (Much tinier than it appears there, it was still a juvenile.)

As best as I can figure the adult female, the first one, had wandered in and taken up residence between my table and the wall and I'd been killing her offspring.

After spraying I found these: dying in my cabinet kickspace

same spider a few moments later, dead

dead with pillbug for size comparison

alive but dying

My husband also killed some before we sprayed, but didn't take pics. After those last 4, we did not see any for a few weeks, then last week I found a live juvenile in the container where I kept my Box Tops For Education that I save for the school. I haven't seen any since then and you better believe I'm on high alert for their distinctive webs.