Love the character and actions contrast, I am assuming it was a blowjob.
She's got pubes on her upper lip, so I'd say so.
If you tell this to Fusou-anesama I am going to murder you...This is the last time I am doing such things...
The use of "masu" means Yamashito is talking aggressively but still politely, same with the other bubble about Fusou.Don't misunderstand...