Actually, PUAs are far more likely to display less relationship interest than they truly have, rather than more.

So this seems to fall under the category of deceptive. The PUA undertakes actions to make the other person hold a false belief for the PUA's benefit.

Ha! You expected me to be only interested in a one night stand because I didn't act like an adoring little puppy on the first date. Now, since the sex was so great and we have awesome physical chemistry and emotional rapport I will call you up another time and see if you want to date again and maybe you will have to say no. You have fallen right into my trap. Mwaha. Mwahahaha!