Is that a picture of 5 generations?
4 Generations if one of the middle ladies (?) is great-grandma
I’ve read quite a few accounts of these type pregnancies, usually mom is very heavy & perceives kicks as “gas bubbles”, but there were a couple where mom was very athletic & did not have regular periods because of low-body fat. It seems impossible, esp. if you’ve had a pregnancy and know what it feels like, but it does happen.