I think this is a morph.
Not a morph
You sure? Look at the mirror reflection. It looks to me like the tricep has been pulled down in the middle to make her arm look bigger, but it doesn't extend down like that in the reflection. Her arm looks more like it does in her other pictures in the mirror reflection.
Her biceps are really nice, but it's the rear bicep that really stands out.
She’s STRONG !!!