Related to this question: "Since" at the end of a sentence where it was stated that since can be used at the end of a sentence:
There were the children to consider. She had told him she wanted a divorce two days ago, and neither of them had slept since.
Is the above prefered over:
There were the children to consider. She had told him she wanted a divorce two days ago, and neither of them had slept since then.
Does it depende on the context, or are they equally valid?