So many things about this seem odd!
Why not leave her where she was killed?
Why drag her such a short distance from the murder scene?
Didn't she check in with her son when she came home?
Why send a message to the husband, from her own phone, and level a threat against the whole family?
All the previous disappearances of mother and older child (a baby at the time), do they tie in?
Don't they have a Ring camera or some other security system?
Is it a walk-out basement? Is there a back door to access the house?
The killer walked to get there and then to take her? Why? It seems...strange. Wouldn't "get in and get out quickly" be more in line with a vendetta? Wouldn't kidnapping and then torturing, leaving her far away be more "logical"? If the whole family is in danger, why not do away with the kid -who seems to have been oblivious- at the same time?
Maybe I'm reading too much into it, but -in MOO- it's way too operatic. Too violent a crime for it to be a hit (a hit tends to be cleaner)? This looks like it's been designed to distract attention from the basics.