Not an egg sac. Instead, evidence of spittlebugs which I explained on your other thread.

That's a population worth an application of insecticidal soap, in my opinion. The slightly caustic soap will dissolve the 'spit ' and those plant sucking larvae will be more vulnerable. Spray on a cloudy or overcast day, if possible.

I actually like that kind of spider, they're kind of cute and fuzzy and spring-loaded. :) I took 2 big spiders out today, threw them into the clematis,then I found where they were hiding out on the guest bath counter and one thing led to another and I ended up cleaning the whole bathroom. lol But boy, my glass-marble countertop is SPARKLING!

It's one of the "false Widow" spiders, Steatoda grossa. These are, as Jean001a pointed out, in the Theridiidae family, which includes true Widows( genus Latrodactus) and the American House Spiders. These, however, are not considered "medically significant" in terms of venom.