Other than I have "enough" money and I can. What are you thinking?
I'm a widow with adult children. Have always been financially independent (actually DH and I did have completely joint finances, but I always earned at least half). There was some life assurance, but I've put that away for if/when I want to help DC with house deposits.
I'm living a comfortable life on my income, with some other savings put by. An opportunity came up that means more commuting, but that I can work 3 days PW for the same (decent) salary as my old FT job.
It seemed like a no brainer to me. If I'm honest I've found managing the large family home on my own quite demanding and as a menopausal woman, life is more tiring than it used to be. This gives me a lovely balance -my working days are slightly longer because of the commute but that's manageable and I get time off to do house stuff and hobbies, so my weekends are free for socials and travel, which I do quite a lot of.
Naively, I thought friends would be pleased for me, but I'm hearing a lot of sniping about it's alright for some with a widow's pension. FWIW I don't have a pension and am supporting myself (because we always knew I could, so didn't deem it necessary), but even if I did, why would people be bitter about it? I did lose DH, after all.