I am 45.
DD is 14. (And SNs - ASD, ADHD).
I work FT, with some travel, DH works FT with a lot of travel.
DD is now in secondary school, so more independent. Getting to be somewhat human in her interactions with people (actually chatty some days, very sarcastic a lot, but hormones have also kicked in).
We have started to get a life back in some respects. We haven't managed any time away as a couple for a few years now (DFIL died, DMIL has a lot of demands on DH, DD has a very active sports and activities life at weekends, and our rare weekends that are free end up being for DPs and DMIL). But we have had a good few nights out alone and with friends, as adults - DD has moved from happy with a babysitter to being happy home alone as long as we're contactable and home at a reasonable hour. (We live a distance from family so used to use paid babysitters locally, overnights aren't possible unless we bring her down to family first which basically means we'd get less than half a weekend to ourselves).
But teenage years also bring their own challenges, in school, activities and at home. Diaries clashing. Demands for money (school things as much as requests for enough to meet friends for hot chocolate in coffee shops etc). Fewer clothes are needed, but the type and labels are far more important (a\nd need to be tried on in person so I can't just pick them up online or on my lunchbreak).
And both DH and I are very busy with work - he has been promoted in recent years, and while I have stayed at the same level since shortly after DD was born, I know part of that is because I haven't been able to dedicate myself to prepping for interviews or pushing extra projects like I used to before she arrived. And I am the person who stepped back to not travel much and not stay late much etc at work - we both juggle, and DH has done as much as me in terms of covering illness etc - but I have stepped back for DD, taken extra time off to cover summers, done the regular doctors appointments, taken the extra parenting classes that are only available in the working day etc.
And I am getting tired - its an age thing. I don't have time to exercise anymore, and I am definitely hitting peri-menopause at least. I really couldn't see myself chasing after another baby at my age. I love seeing various DNieces and DNephews - but being able to hand them back (ranging from just a few months to 11). I quite like being a Cub Scout leader - but (other than paperwork) that is only 90 minutes a week. The thoughts of being responsible again for a very small person actually fills me with dread.
But it does suit some people - I have an Aunt who had her 1st at 34, and her 3rd at 42. And she is looking fab, has 3 great DCs (aged 10-18), manages work (but is PT) and home, they are all doing lots of extra curriculars etc - she also has a great social life. But had a lot more family support around her to help out, all along the way.