Hi, Sue,
nice to see you in here, much appreciated. 'Centres' as a regional variation - suppose you could call it that

it's UK English, we've been using it for a while now. The long 'i's', as I said to Alan, this is intended as a performance piece and the assonance of these lines is quite deliberate - the 'once but won back' combination is similar because of the invisible alliteration between 'once' and 'won' and the more obvious 'b' alliteration of 'but' and 'back'. The fact that you found this a 'tad weak' actually fits my intent that the succubus achieves an easy victory. This whole piece is written from her POV and does include an element of boasting. I am aware I'm resisting a lot of the critique offered but hope you and others can understand why,
Jim