If they say they’re ready, they’re ready
Don’t try to tell your parent that she isn’t yet ready to date. Only she knows that. And how do you like it when people tell you that you aren’t yet ready to date after, say, a breakup? Or really, how do you like it any time anybody tells you, a full-grown adult, when you aren’t ready for anything? If your parent says she’s ready, then she’s ready. And hey, even if she realizes later on her own that she wasn’t, that’s okay, too.