I think I might have found a bug. There are only two people in this family. He is outside ready to fix the faucet, but when I put her in the shower she shook her head and said someone was in there.

The game works on a 'reservation system' for the shower and the toilet, so that peeps are not using them at the same time. A peep will 'reserve' the shower long before they actually get there. Did you drag the man to the hose right before this? If so, he probably had a reservation on the shower before you interrupted him.

No. I dropped her in the shower first, then stopped him carrying a weed to the recycle and took him straight to the hose. As I dropped him I heard her "Uh-Uh". Before I started fixing any of it, I had them both pulling weeds.

If he was close to being done with the weed, he could have reserved the shower for his next action.

He was. He was nearly to the can. Thank you Lady!