Yes, the iddah must be done! If she is initiating the separation, she must give back the maher and this would be khulu. Her mother is a mahram to him forever.

After marriage contract (aqd) they did not consummate but engaged in foreplay. Then the girl wanted divorce saying she does not like the guy. So the guy was forced to divorce. Will she have iddah? And what shall be done with mahar? And is her mother a mahram forever?