My name is literally WEIRD420XL.
Also, STEPfather/STEPdaughter. Pornhub rules.
I feel like I'm coming across too snarky here. What I'm basically saying is that we're operating by the rules of Pornhub for this story. The STEP is the most important part. They're not blood-related.
As for the weirdness, yeah, I'm weird. I like being weird in my stories because if I'm not able to vent my weirdness in stories it gets vented in real-life, which sucks for everyone. If people were free to be more weird and encouraged to be more weird instead of repressing things, the world would be a better place for all.