Lots of stuff going on here. Top of the list, yes, that's a odd assignment that should have been worded better and thought about a little longer. A shot of a kid reading in an unusual place is a good motivational assignment, but the teacher should have thought twice about using the bathtub as an example, even if they meant "fully clothed with no water in the tub". Never assume anyone, kid or parent, won't mess up what you're saying, as the DUmp illustrates so well. Next, it's likely that the school has a system in place for sharing photos. It may just be in a Google classroom, or it maybe a different program. My wife uses one that lets her share photos with parents of what their kids did in school that day, and parents can also send her photos of stuff from home, like how they are practicing school stuff or makeup work done at home when kids are out. It's monitored and accessible by the school so no shenanigans are going on. Hopefully, this school was using something like that, not just having parents send pics to teacher's personal phones.
The moonbat's responses are fine examples of their hypocrisy/doublethink/cluelessness. They want schools teaching kids about sex, masturbation, homosexuality, gender confusion, transitioning genders, abortion, "tucking" among other deviancies at 2nd grade and younger, they want open pedos with their pink and blue hair and tranny flags in classroom, but somehow, they are righteously upset over this.