Trierweiler is going to Mumbai to support French aid group Action Against Hunger, in a two-day visit organised long in advance of the affair allegations.
But if Trierweiler was initially invited as first lady, it's not clear since the story broke what role she is playing today.
Neither Hollande nor Trierweiler have commented on their relationship since the story was published, although Hollande has promised to clarify its status before visiting the United-States on 11 February.
Trierweiler has been even more guarded about on the situation.
On Thursday her lawyer, Frédérique Giffard, sais that she was aware clarification was needed.
That brought a quick rebuke from Trierweiler, who said the lawyer was speaking without permission and had been dismissed.
Her chief of staff at the presidential palace declared he was the sole person authorised to speak on her behalf, suggesting Trierweiler still considers herself to be first lady.