明知是敷衍却微笑着附和
[míng zhī shì fū yăn què wēi xiào zhe fù hé]
This phrase, '明知是敷衍却微笑着附和', suggests a situation where one knows that they're being placated but still nods along and maintains a smile. The individual chooses to pretend all is well, despite understanding the lack of authenticity in their relationship.