Charles' comments are correct...
Charles is fixing it so I don't have to post as much.
And so far he's been right every time.
... but if it's a junkpile (I read "free") bike, all is not lost.
I'm 5'6" with a 28" inseam, so I can relate to your challenge here.
You really want to keep the seat height in this case to about 25" or less.
A way you could use this frame is to replace that tall front fork with a rigid, inexpensive ATB fork - you could find one at a bike co-op, or maybe even at the dump, so anywhere from free to $5-10. They're pretty common. It's unlikely you'll miss the front suspension in this case. My experience is that with these Walmart-level bikes, the front suspension is going to bottom out every time you look at it hard anyway.
That rigid ATB fork would lower the front by maybe 3-4 inches.
Then, you can dial-back the preload on the rear suspension to lower the rear. Just turn the upper spring mount and watch the suspension lower down.
This would keep the steering geometry intact, and lower the bike significantly.
Then, if she falls in love with it and you find you like tinkering with bikes, you can always keep an eye out for other frames and transfer the kit parts.
Hard to say "no" to functional free stuff, especially if you can have fun and learn by using it.
One of my favorite frames for tinkering, the Walmart Tiara kids bike, my Dad picked up two of from a flea market for $5.
Good luck. Shout out if you need help. We're all with you out here.
Cheers,
Doug
