Is it permissible for a mother observing 'iddah to receive her daughter, who has just given birth to a new baby, in her home and enter the same room with her?

The waiting period (iddah) is obligatory for a woman whose husband has passed away. Its duration is four months and ten days if she is not pregnant, or until she gives birth if she is pregnant. During this period, she must observe mourning (ihdad), which involves refraining from adornment, perfumes, and anything that falls under these categories. Everything else is permissible for her, such as sitting with her unmarriageable kin (mahrams), working in her house, and taking care of her children. Her mother is absolutely not prevented from entering upon her.