After the John debacle, the days went relatively smoothly, with Lonappan never learning about that stuff. Initially Thankappan was suspicious that M'Baku might leak it to him, given that he got some kinda reward. However, he was surprised to see the canino not sparking another feud. Rather, he looked towards him with respect and fear, a feeling that the MIB agent appreciated.
Since M'Baku wasn't considered a threat to their current peace anymore, Thankappan's attention reversed towards John. He was still suspicious of John. He couldn't decipher whether John was acting so to avoid suspicion or if the neuralyzer actually worked. Because the neuralyzer working would be a bigger surprise than John faking it.
Yo, hope you had fun! Cheers!