Given that the OP is a mom of two, I assume that she is also older than her cohort. Being an "older" student myself (by 2 years for the entire cohort and 5 years for the clinical students), I feel I had to put in extra effort into staying connected. Most people in my cohort are between 22 and 25 and thus simply in a different place in regards to "life". While I think about what type of insulation is best for my house and how much money I should put towards a Roth IRA (yeah, I know super boring), they can spend literally hours talking about Dr. Who🙄.
We are all extremely competent and driven to succeed, otherwise none of us would have been admitted to the program. And as far as I can tell, everybody in my cohort is doing well with keeping up with the demands of the program. But I noticed that especially those who are straight out of undergrad still have that mentality of putting a checkmark next to a box - at least to some extent, let it be a deadline for a class assignment or a deadline their adviser gives them. Obviously, they were at the top compared to their peers in their undergrad program in terms of working independently, etc. but at least in my program you can tell pretty well that those who did a master's or worked in between undergrad and grad school, are better in terms of thinking ahead and planning long-term. At this point, I am about to submit to first-author pubs and have a pretty solid idea for my dissertation (which, of course, will likely be modulated) that I have discussed with my adviser and other professors whereas most students are still muddling with their year-1 project. And part of the reason is that I spoke to my adivser at the very beginning and told him that I want to do A,B, and C and I want those to have happened by these dates and if that sounded okay with him. I am aware that this is not the norm, but having a very detailed plan will hopefully allow me to accomplish everything I want in 5 years.
I don't think that there is anything wrong with sharing this information with your cohort and if they are jealous (in whatever shape or form) that should not be the OP's problem. Obviously, if she was rubbing into their faces as if she was better than them, that's a different story. To me, it sounds like she has her s**t together and is able to work efficiently towards her goals. My guess is that even if her adviser tends to be someone who pushes for student to pass this hurdle earlier than other students, the department would still need to give their permission and if they thought she couldn't handle it, they wouldn't let her defend the paper. Moreover, while it can certainly a bit embarrassing if your adviser praises you publicly, it is not like the other students were told that they suck.