I think Stevie is very generous with her co-writing credits. It goes both ways. She may have written very little if anything of 7 Wonders but gave herself credit. The roles could have been reversed in other songs. How much did Sandy contribute to If Anyone Falls. Stevie could have written most of that song and I think she said that and Sandy gave her a few lines. The song also credits Sandy and Roy for synthesizer. Lets be real, Roy is very talented and I would bet my life its him on the main grind of the synthesizer. Sandy also co-wrote Nightbird which Sandy plays that dreaded keyboard beginning, like someone squeezing drugged cats. Sandy's piano sounds very basic on The Wild Heart song too. What did her brother deserve to get co-writes on The Nightmare? I think he may have wheeled in the same glass table
That last joke credit is to Jeremy Gloff from his RAL podcast. It was too good not to use again.