No, Totmynina was nowhere near Yagudin after SLC. They started to date during the first Averbukh tour which happened right after Turin Olympics. She dumped Plushenko who quickly switched to his nowdays wife. Tatyana actually mentioned in some of her interviews that for some time after their breakup Plushenko didn't want to communicate with her as long as disappointment was still there but things became better with time. And then, yes, there were some wobbly relationships with Yagudin when at some point they broke off and during this time he dated his celebrity partner from TV show.