Not the same thing, but similarities.
My DNan had three DC by the time she was 21. In the fifties, she was the housewife. Grandad brought in not a great wage, but they managed. He didn't want to travel (never left the country) and she became just "mum" and his wife. Then all us grandkids came along, and she just became default childcare for the 6 of us. For years. She never complained. She toed Grandad's line of a very simplistic life, again never complaining. I love her. And now I'm older have so much respect for her. We all thought she was happy. And it's why I have never asked my own parents to have my DC, and have paid for nursery.
When grandad died, she was in her 70s and we were all grown, there was no childcare. Almost overnight she changed. Booked holidays abroad with her friends. Went to America! Joined a history class, a choir, the WI, a walking group, took up gardening. All things she was never allowed to spend "his" money on. For all those years. Her social calendar puts mine to shame. And in fact, I simply couldn't do the things she does because I'm looking after my children. She has a date out with friends every day. Often one for lunch then another to go to the theatre, or a painting class or something the same evening.
Right now, she's mid eighties and on a walking holiday on the coast.
I guess my point is, she loves us all. But you can clearly see what she wants to do with her life, the person she really is, vibrant, full of friends, so many interests. It exhausts me just thinking about it. And her being the 50s housewife with my mum, and siblings, kept her from that. Then they all let her look after all of us grandkids, so we kept her from that. They, and subsequently us, took 30yrs of her life. And look what she did, the very minute she was able too. She spent the little money she had on them, then us. And I feel so much guilt for it, now I see the woman she really is.
I completely overcompensate now, I take her everywhere I can. I buy her stupid expensive jewellery, bags, clothes because she's never had any, and she deserves the world. We go for lunches at places she has never been able to try. 5 years ago, she had her first Thai and has it regularly now. Every time we do something new, it breaks my heart to hear "oh this is lovely, why have I never tried this before?" And I think of how little time she has left to enjoy the things she always deserved but sacrificed without a word of complaint.
So I guess, what I'm saying to you, is whilst children may not be in your journey, and some things have moved on since the 50s, some things haven't. you have the opportunity to be "Nan" from age 36. Live your life xx