Hermano y hermana rusos?

• 00:00
• 05:02
• 10:04
• 15:07
• 20:09
• 25:12
• 30:14
• 35:16
• 40:19
• 45:21
• 50:24
• 55:26
• 01:00:28
• 01:05:31
• 01:10:33
• 01:15:36
• 01:20:38
• 01:25:40
• 01:30:43
• 01:35:45
• 01:40:48
• 01:45:50
• 01:50:52
• 01:55:55
• 02:00:57

Can anyone tell from what they say if they are brother and sister ?