Adventuring party who thinks their rescued - and newly-minted member - tiefling is slightly plump around the middle from the easy life they've lived thus far, as well as being in captivity while an upstart lordling was trying to ransom them. No matter, plump or not they'll be just as strong as the rest of them after a few months on the road.
Imagine their surprise when one fine spring morning they're woken up one by one, groggy as shit, because the tiefling is grunting and growling in their tent - and when they warily part the flaps to check on them (arcane possession? hidden injury? what now, gods-) the party finds them on all fours, tail arched high over their back as they squeal and rock back into the heels, their tight little hole struggling to spread around the head of the baby they've been carrying in secret.













