in the precap they show that dida is out of her coma, and for sure she will reveal ragini's truth. that she conspired with sanskaar from the beginning, they both planed the mms scandal together. so that swara would hate lakshya and ragini will trap him in her love. that she had known for a long time that sanskaar was not mad but was pretending to be.
then how can lakshya marry the girl who was responsible for sending him to jail, annapoorna is happy to accept the girl who framed her son and send him to jail for the mms and kidnapping. she thinks that this manipulating, conniving girl is worthy of being a member of the maheshwari family.
they clearly dont hold the character of their family members in high esteem.
they so easily disowned sanskaar, but willing accept ragini to be his wife.