I get the opposite feeling. If she already knew him before then why wouldn't he jump out of his vehicle, and gladly help her load her luggage?
For that matter neither were married or had a boyfriend or girlfriend so why wouldn't he happily pick her up at the airport saving her from having to pay the Lyft driver.
Why have the meet up at the park instead of having the Lyft driver bring her to his home? After all everyone knew he ran an air bnb where women are seeing coming in, and out. If she had been with him before wouldn't she question why they had to meet in a dark park instead of going directly to his home?
Imo, the reason he didnt do these simple normal things is he had never had face to face contact with KL before,and didn't want anyone to see who he was.
He wanted to make sure that remained the same with others thinking he still had not had face to face contact, and only had online communications with KL only.
That is the only thing that makes any logical sense to me at least, and why he was very secretive when secreting KL into his home sight unseen. After all KL was a beautiful very attractive young woman men would proudly want to be seen with.
He was protecting his identity from being known from moment one making sure he wasn't seen picking her up at the airport. Also he made sure not to get out of his vehicle so he could be seen by the Lyft driver.
I still believe he lured KL under false pretenses.
I also do not believe anyone else was involved in the crimes against KL. Predators like AA want the helpless victim under only their power, and control.
Narcissists, and psychopaths do not like sharing anything with others.
Imhoo