Young Maria v10.3.0! Sibling part update

Hi there! This is another update from my team. It contains a great improvement: you have two more options when choosing siblings now. You can start without any siblings or with both brother and sister.

UPD 10.3.0! (by Middlewared, Rachael, Plaze)
Changes:
- Now you can have:
1. No siblings at all
2. Only brother
3. Only sister
4. Both brother and sister
- Minor changes and fixes

Let's say thanks to our team:3 See you soon!