Kim drives Greg up the wall when she worries that Sam isn't walking yet. Jimmy advises Greg that he should let Kim have the day off if he wants her to lighten up. So Greg arranges for Kim and Christine to go a day spa, giving him and Jimmy a day alone with the kids at the park. Jimmy gets hot at the park, and talks Greg into taking the kids someplace else that's cool -- a casino. Greg catches Sam on tape taking his first steps in the casino lobby, but then realizes that he can't show the video to Kim because of where it was taken. While waiting for their massages, Christine manages to talk Kim into relaxing more when she returns home. Jimmy pays a friend to digitally alter the background in the tape to a park, so Greg can show it to Kim. Kim is thrilled to watch it, until she -- and everyone else -- views Sam walking right over a pond! Greg has no choice but to come clean with Kim about what happened, causing her to unravel all over again.

Greg, Kim, Jimmy and Christine are horrified to see a mother nursing her walking, talking toddler at the park. Greg wonders what's the proper cutoff age for breast-feeding. Kim says about a year, and she couldn't wait to stop nursing after that. But that night, she screams at Greg to get out of the baby's room when he catches her off guard still nursing Sam. Greg thinks she hasn't stopped breast-feeding because she can't sever ties to her son, but Kim confesses she does it so she can have big, milk-filled boobs. Greg convinces her to start weaning Sam now before she's got a walking, talking toddler asking her to breast-feed him at the park, but no matter what he tries, Sam won't take to bottles. When Greg's just about ready to give up, Jimmy tells him how he got Dominic and Logan to wean; he'd dress up like Christine with a bottle shoved under her clothes and pretend to be Mommy. It works like a charm, after which Greg finds out that Jimmy made the whole story up. The next night, Kim c

Kim's and Christine's father, Don Ludke, comes for a surprise visit. Greg feels left out as Don has never liked him -- and still doesn't. When Greg's attempts to win him over fail, Christine tells him the real reason her father doesn't like him is because he doesn't respect people who can't do things around the house. Greg changes his plans to buy a jungle gym for the kids after Don says that only an idiot would buy a pre-built jungle gym when he can build his own and save money. In an effort to impress him, Greg tries to build his own jungle gym, but it falls on top of him while he's working on it. After Greg says to Kim that he doesn't want Don in his house again, Jimmy tells him that the way to get on Don's good side is to make him feel smart without intimidating him, like he's wont to do. Following that advice, Greg extends the olive branch to Don, and asks for his help with the gym. Afterwards, he starts to have a heart-to-heart talk with Don in regards to the way he's treated, on