Stupid fecker. Dd(3) was complaining about an itchy bum six weeks ago, so I gave her the tablet and took one myself, washed the sheets/towels etc. She stays a lot with her father, so I asked him to do the same. I even offered him the leftover dose in the packet. Oh no, he wouldn't accept that this could possibly be the case. Any uncleanness was clearly my fault etc etc. And cue one worm life-cycle, here we go again.
Still, he's going to face (if that's the word) some built-in consequences, eh? Mwahahaha.