a redback spider
The spider with a big white butt is likely a species of orb-weaver spider, known for their distinctive white or light-colored abdomens.
THE ONE WITH MIXED PARENTS
I think its a white tail :D
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They are called White-Spotted Brown spiders
Its piosonous alright, but I dont know what its called.
A garden orb weaver probably
Is it a white orb? In that case it would be an egg sack. If it is actually a white spot it cold be a wolf spider. I am sure another user could provide a more detailed answer but I have seen wolf spiders with white spots.
Your mom.
The spider you are describing is likely the missing sector orb weaver (Zygiella x-notata). This species is commonly found in the UK and is known for its distinctive white body with red spots on its back. It is a harmless spider that creates intricate orb webs to catch its prey.
The spider you are describing sounds like a daring jumping spider (Phidippus audax). They are known for their black and furry bodies with white spots on their backs and white stripes on their legs. Daring jumping spiders are commonly found throughout North America.
It could be a Phidippus audax. I live in Dallas and just terminated one in my bedroom on orders from my wife. I didn't know what kind it was but did a search on the web. Google that name and see if the pics match your spider.