Given every negative and nasty thing she has said and intimated over the years about members of the royal family, and the serious accusations she has stated publicly about the Royal institution as an entity, using the royal title should be anathema to her if she had any sense of self-honour and conviction in her opinions or knowledge. And yet, she continues to trade on her royal connection both socially and economically. "Oh, but she's entitled to use it" her supporters will say. Sure. However anyone who had any integrity would most certainly not use their married title, and furthermore, they would do everything in their power to forge and promote an image of self-made success. Sending a gift using her married title on the card, whether she's entitled to use it or not and whether it is a personal and not a commercial gesture, just perpetuates her public image of a woman eager to remind people of her status, and translates as smug and entitled. This is precisely why she is so disliked and struggles to gain much respect from the wider community. A very big misstep in my opinion.