Spiders can lay their eggs under being skinned in wounds created by their bites. Fact: In a surprisingly widespread urban legend, a spider bitten a nameless lady (usually on her cheek) while on trip. She later develops a bulge, from which baby spiders emerge!
Somehow or other, the venom must have transformed into eggs. Spiders do not find the human body an apposite position for egg laying and no actual case something like this can be found wherever in scientific or medical literature.
Some spiders are deadly. Fact: There is no spider species anywhere that can well be called "deadly." Obviously a few people have died from spider venom, but there is no species some place on earth capable of causing overthrow in humans inasmuch as 10% of cases, even if crude.