Yes, yes it is. A lot of writers went around retconning rape into a lot of female heroes' backstories and portraying some as underaged prostitutes. Heck the most recent New Mutants movie injected child molestation by slenderman looking motherfuckers into Magik's origin story when her captor was just an emotionally hostile demon in the comic.
Yeah, Catwoman was retconned by Frank Miller (I think) into having been a prostitute before being a catburgler, Kevin Smith had the Black Cat's badassitude, overt sexuality and take-no-shit attitude be a direct result of a sexual assault, Rogue was implied to have been assaulted the first time the X-Men visited Genosha, there's a long and horrible history of this shit going on. Ignoring the infamous Ms. Marvel (Carol) story (the lunacy starts in Avengers #197 if you're looking for breakdowns of that particular saga, be warned, it's amazingly weird and gross), Magik's backstory gets real dark, real quick.
For those unaware, Illyana comes into the X-Men as a six year-old and, while she's out in the mansion's grounds, a demon literally steps out of the shadows and says 'hey, come with me and I'll take you to a wonderful place of magic where you'll be loved and adored above all else' and gives her a pretty necklace saying she'll be a queen and can have everything she wants. And she goes with him and, to all intents and purposes, vanishes off the face of the earth. She comes back from this relatively quickly, but because she's been in the demon realm of Limbo (one part of the actual, literal Hell) where time flows differently, from her perspective, it's been about a decade, so she's now 16, her personality has changed, going from a sweet little girl to a sullen, angry and confrontational teen and, most importantly of all,
does not want to talk about what she was doing and what was done to her for the last decade.
Now, at the time this story was released, it was around the time of stuff like the Satanic Panic and the McMartin Preschool trial (both of those and Illyana's vanishing/return all happened around the same time IRL). While I've never seen any official indication that the story was influenced by the news, it'd hardly be surprising. Another thing to remember is that, at the very least, the Comics Code Authority was very much in effect at the time, and it seriously limited the kinds of things that could and couldn't be portrayed in comics at the time. In more recent years, Magik's likened her time in Limbo as a child to actual abuse, but obviously, they couldn't outright say it at the time. But, come on, a stranger tells a small child they've got special treats for them and they vanish into the shadows, never to be seen again? That's the very definition of Stranger Danger as every kid in the 80s was taught. You don't have to read that far between the lines to see what they were possibly suggesting.
