For my own curiosity, could you please elaborate which law was broken? And if you do find one, elaborate how is it not unconstitutional, given that “put X into a bikini” is constitutionally protected speech, and the output fails the Roth test for obscenity and is thus protected just the same. Would not every other law claiming to be relevant be null and void w.r.t. stoping this in this particular case? SCOTUS was quite clear in Roth v. United States. The later Miller case is also of no help, since nowadays appearing publicly in a bikini is considered quite normal and not at all obscene or sexual.
I get it. If this happened to a member of my family, I'd be pissed too. But, as logical people is it not our job to NOT simply leap from "I'm very angry" to "It must be illegal", but to be calm and rational.