Galko's skin got really dark as a result of tanning.
Otako comments that since Galko's skin has tanned so much, her nipples must be dark as well. Along with Ojou, Otako yells that Galko has dark nipples.
But if she doesn't bleed afterward, she'd lie 
and say, "It tore during a marathon."
لكن إن لم تنزف في النهاية، ستكذب وتقول بأنّه تمزق أثناء ماراثون
aber wenn sie danach nicht blutet,
et pour expliquer
qu’elle saigne pas,
ma poi non sanguina
aí, quando não sangra, mente e 
diz que arrebentou numa maratona.