I don't like it either, but: "Somewhat strange information related to a story that's big right now" is quite a desirable commodity in the news business. It's a perfect opener ("Have you heard
this candid fact about a person that you didn't even know about before yesterday!?") and fakes in-depth knowledge ("Oh boy, they're really looking into everything!") even if there's isn't much of a story right now.
Yes, it's devoid of information. Yes, it's not in the public interest to know. Yes, it comes at a cost to the person talked about that is disproportional to the gain the audience has from the information. Yes, she wasn't in the public eye.
But is this definite proof of propaganda? No.
More likely it's just yet another outgrowth of what happens when news organizations are competing for attention. It's histrionic. But, well, there's human nature for you.
[edit] As noted by a comment - I'm only pointing out a flaw in the OPs logic. This really might be propaganda, but OPs "proof" simply isn't one.