I agree, it does look like a tapeworm. Please tell your wifey that worms ARE icky for sure. Dogs get tapeworms by swallowing an infected flea, so with an appropriate de-worming and good flea control, you can rid your sweet little pups from tapeworms!
Just to add a bit of humor, at one time in the US and currently in other countries, the beef tapeworm is used as a HUMAN weight loss diet! Here are a couple of links...
Tapeworm Diet Review Tapeworm Diet: Using Beef Tapeworms in Humans