May be she is hel[ping Ragini in her plan to win back Laksh. And she well knows right now its sWara's good time and everybody is in her side so she is acting to love her while all that she wants is to ruin her and to get back Laksh for her Laado!
MY assumption is based on the simle idea that Alka ji is best known for playing negative character so I doubt cvz have roped he rhere to play a positive character.
I think we will get to know it after so long a time ie when Ragini will be back to mm and will be happy with Laksh and then she will try to create rift between SWara and Sanskar may be showing Sanskar that SWara still loves Laksh...thus making him jealous!
What do you think!