-TODAY IS NOT THE DAY.-
Derrick realised that he did not have to worry about what Nina's reaction was going to be once he told Robert the full truth.
Actually, come to think of it. She should be grateful because he was taking the weight off her shoulders. She should not worry about telling Derrick the truth because he was going to do it as soon as possible.
Of course this was breaking his promise to her but it had to be done. It was for the good of the two of them.
He was so sure that Nina would be grateful afterwards. This was honestly not going to affect their relationship in any way. He knows how deeply they are in love with each other and this will make it easy for her to forgive him afterwards.
If bad comes to worse after telling Robert the truth, she was still going to choose hi
