Ewwww no!!! YANBU @Melmi256 I have had 2 kids (now late 20s, and left home 7-8 years ago,) and I won't look after ANYone's kids. Oh hell to the no!!!!!!!!! DH and I looked after and raised our own two. (I did 75% of the childcare myself I would say as DH worked more hours,) and we had NO help from anyone.
Mine and DH's parents died when we were quite young, and we had no help - financial or otherwise - with our kids. Looked after them ourselves. Loved it at the time (20 years of it!) but would not do it again. That's why I struggle to fathom how and why people have another kid at 42+ when they have kids that are adults already.
Anyway - this is one of the main reasons why there's no fucking WAY I would be babysitting other peoples kids. A neighbour of mine has hinted several times that me and DH 'can babysit if we like ha ha ha,' several times now. We just say 'oh no you wouldn't want him with us, we eat babies for supper!'
Then we walk off/drive off etc.
She chose to have a baby on her own, when her parents live 200 miles away and her sister lives 300 miles away - and she has NO HELP ... But this is not our problem! It's her problem that she has no-one to look after him while she fucks off out. She can pay for childcare - like WE had to.
#sorrynotsorry I am not a mug, and neither is DH.
We keep a lovely garden too, and have had remarks and hints from 3 or 4 neighbours - including this woman with the baby, to 'come and do our garden if you like...' A few people have said it 3 or 4 times, and it's got to the point now, where it doesn't feel like they're joking, and would absolutely take us up on it if we said yes.
NOT GONNA HAPPEN.
We have around an acre altogether of garden, and multiple bushes, trees, and plants, and flowers, and it's hard work ... I LOVE it, but it is hard work... A few neighbours seem to be under the bizarre impression that just because I enjoy gardening, and spend 12-15 hours a week out there (from April to October,) that I want to do theirs. 
Ditto with kids. Because me and DH had them - nearly 30 years ago, some people think we can look after theirs/want to look after theirs, and want 'cuddles' with their newborn (ewwwwww,)
NOPE, I am not interested in your children, just because I had 2. Feck off! 😆
p.s. Obviously I will look after my own grandchildren - sometimes - if and when my kids have kids themselves, but no-one else's. Nope! Been there, done that, paid my dues, earned my stripes, done my bit lalala.