Somethings never change,husband wife talks for instance Shri Ram was preparing to go to forest alone, Sitaji was adamant though,she managed to convince Ram. This may make Bharat look like a villain but at that point of time it was not clear if Bharat will accept the throne or not.
First Part of Shri Ram’s sentence (related info)
२-२६-२५ ऋद्धि युक्ता हि पुरुषा न सहन्ते पर स्तवम् | तस्मान् न ते गुणाः कथ्या भरतस्य अग्रतः मम ||
Men endowed with power and fortune do not tolerate extolling of others . Therefore, my virtues should not be extolled by you in front of Bharata. – This clearly states why Shri Ram tells Sita not to praise him.
Second Part of Shri Ram’s sentence (related info)
२-२६-२६ अनुकूलतया शक्यम् समीपे तस्य वर्तितुम् ||
You can stay familiar to him, by behaving with him amicably.
२-२६-२७ स प्रसाद्यस्त्वया सीते नृपतिश्च विशेषतः ||
Oh, Sita ! He (Bharata) is fit to be rendered gracious by you
२-२६-३४ विप्रियम् न च कर्तव्यम् भरतस्य कदाचन | स हि राजा प्रभुः चैव देशस्य च कुलस्य च ||
Bharat is the king and the master of the kingdom and the family . Hence, you should not do what is displeasing to him at any time. The sum total of it is that Shri Ram instructed Devi Sita to a.) Not praise him but praise and behave amicably with the rightful king.