The full context would help.
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(Archive)
Nick's desperately trying to get Aaron to say "Kayla" because he thinks that if he can get Aaron to say it (even when it's very obvious that Kayla's husband is trying to trick him into doing it) bad things will happen to Aaron.
With any luck, Nick will start drinking when his amazing plan fails. Nick is no longer being drug tested, according to him, and if that's true and he DOESN'T start drinking, he would be acting like a bitch who agrees with the assertion that he can't handle alcohol responsibly.
It's really simple. There were three crackheads in the home at the time and there's no way to tell unless somebody talks which ones out of the three were responsible.