Elderly Python Starts Family?

A 62 year old Ball python (known only as' 361003') in St Louis Zoo has, reportedly, laid 7 eggs, in spite have not contacting a male of the species for over 20 years (https://www.theguardian.com/environment/2020/sep/11/a-new-squeeze-snake-mystery-after-lone-elderly-python-lays-clutch-of-eggs). This is odd, because such elderly pythons don't normally lay eggs anyhow. The eggs, which were fertile, could either have been produced by facultative parthenogenesis (a form of asexual reproduction, perhaps geared to reptiles sometimes arriving in locations without mates) or delayed fertilisation (involving sperm stored in the female's body, in this case, for over 20 years). Some eggs were removed to an incubator and it is hoped to do genetic tests to determine which method was used by the old constrictor.