I'm not good w/ the names, but I'll do my best.
Mrs Solis (the one fooling around w/ the gardener) was almost caught fooling around with him when her hubby came home early, but he didn't suspect anything. Later, she went to his house (he lives w/ his mom) and told him that they needed to fool around somewhere else. As a gift, he gave her a perfect red rose, one he had searched for for days. She realized that he was falling in love with her, and she quickly left his house. Her husband also ended up getting her a gift, a brand new car. She got very affectionate w/ him which her boyfriend ended up seeing.
Meanwhile, Terri Hatcher's character and Edie (Nicolette Sheridan) are vying for the affections of the new guy in the neighborhood. I think he's an investigator of some sort. Anyways, they both make dinner plans w/ him. They end up having a bigger dinner w/ Terri's daughter. Edie tries to get on his good side by playing nice w/ the dog. The dog doesn't seem to like Terri. She tries to get the dog to like her by rubbing gravy on her hands and behind her ear. The dog chokes on her earring, the guy is upset and takes him to the vet. Then Terri realizes that neither her nor Edie will be winning his affections soon, it's obvious he loves his dog.
Also, the nosy neighbor lady finds that Terri has bought a new measuring cup, thinking about the measuring cup that was found in Edie's house when it burned down.
The mom w/ the three bad boys has a heck of a time trying to get them to behave in the car. She screams, yells, and it doesn't help. She thinks they are conspiring to drive her nuts. So following a neighbor's advice, she leaves them at the side of the road and waits around the corner for about 10 seconds. When she comes back, they're gone. Turns out they went inside a lady's house. The lady gets upset w/ the mom and tells her to be a better parent, or work out her issuges before getting the boys back. The lady grabs the mom's arms, to which the boys jump on the lady and push her away from mom to 'save' her. They all jump in the car, and without mom even telling them they buckle up and behave.
Marsha Cross's character and her hubby are going through counseling. The counselor and Marsha talk about how the husband has never shown appreciation for all the things Marsha does. So even though Marsha is trying to be this perfect wife, the husband isn't so perfect either because he doesn't say thank you.
The husband of the woman that killed herself (mary alice i think her name was) is shown wrapping a wooden chest in plastic and duct taping it. No one knows what's in there. But he takes it and dumps it into the lake. Before he does this, he tells Teri Hatcher's character that he is angry that his wife abandoned him and their son, and will never forgive her for that. At the end of the show, they show the chest popping back up out of the water.
Whew, think that was it! Anyone feel free to add on if i missed something.