[If forced to explain himself, Sanji wouldn't have an answer to give for his sudden interest in meeting Yusuke's mother. It's not like much has changed on his end. No, he doubts Yusuke is gonna dump his ass anytime soon, but there's still that concern of one day testing his boyfriend's patience and goodwill, even by accident.

... But he's... trying here. Step by step. And sensing Yusuke's approval, his face floods with color before he turns and forces his attention on painting more of the road]

Yeah-- I mean, not fuckin yet, gotta find your graveyard first. [Jesus, even his ears are red, to hell with this.]

It's-- y'know... [His pause could snap trees in half, that's how heavy it falls.] Not used to being around mothers, so I'll try to behave myself.

[that's probably as close to a hint as he'll get]