Sophie was really grateful and was tempted because she didn't know what she was going to do once she got back at Hauntingen. She could sell the jewels, but then she would have to work alone and try to make a living there all by herself.
Compared to staying here in the castle with other people, Sophie might be able to have friends and was actually close to a good doctor and midwife when she gave birth. However, Sophie was still a lycan and she didn't know if it would affect the birth.
Also… how would her pregnancy turn out? When Nicholas and she had sex, her husband was still a lycan because the wolfsbane didn't work... did she now carry a lycan pup?
How long would her pregnancy be? If it was a human baby, the pregnancy would last for nine months and she would give birth around seven months from now.
However... if it's a wolf pup… she might actually give birth to a litter of them and her pregnancy would not last as long.