Happened at around the same time as >>2354058

Cadance, like Twi, is also having 20 kids (see the above picture link for the story)

And after that both of them proceed to have $xx

Don't worry Shining. You and Cadance's loving act won't trigger labor-inducing contractions. Her uterus will decide when it's time itself, and that would be around the same time your sister, your children and grandchildren and their friends begin to give birth.

Also it's "forty" not "fourth" in Panel 3