I don't think so. To me it seems to be more of an emotional reaction after seeing Ciri alive and healthy for the first time. Yen still loves Geralt - at least that's what she tells him after the Djinni broke the magical bond between her and Geralt.Does Yen do that in front of her on purpose? (Kissing Geralt)
It's kinda sad that you can't talk with Triss about that scene afterwards. CDPR really had a great opportunity here to give her some more meaningful dialogue, but I think we can all agree that this applies to Kaer Morhen as a whole.