Life changed very fast for Samira and she wasn't capable of adjust to it. She found herself wishing to be back in the harem, something she truly hated, after what she thought she wanted turned out to not be it...
She never wanted to be a heir, she wanted to meet her mother, and it didn't turn out good, and be reunited with Shalah, which was going down hill... Its not easy for someone of power to go from HBIC in a harem to the one that not even her beloved would listen to. She watched her mother replace her father without a second thought, she watched that be successful where her father died in a very hideous way...
In the end she realized life isn't fair and, sadly, in her eyes it was only going to get worse... So she took the weak way out.