To save stiles life again from the nogitsune Scott have to make a decision either to go with the nogitsune or die at his hands
By then everyone was anticipating the ultimate plan but that didn't happen as you stopped Scott from making that decision
" take me instead I may be worthless but stiles is worth more to everyone than you are , so I'll go with you and let go of stiles as you made a promise
The nogitsune " I made a promise with the alpha "
" yes well that changed of plan "
Scott hold your arm " what are you doing "
" everything will be okay let stiles know I love him and take good care of him okay Scott "
Smiling
" now do your end of the bargain let go of stiles "
With that you're gone vanished Scott knew that you were doing good and this was something he willing to get your back
