~1~ *Edited*

Where luke becomes harsh towards Michael after finding of their baby but Ashton and Calum become softer.
Or
Where Luke doesn't approve of the family they're starting, and it drives him to almost torture their sub.
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Under editing, which it might take a while.
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Dom-Calum
Dom-Ashton
Dom-Luke
Fem/Sub- Michael
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There will be Mpreg.
There are a lot of triggering parts that some readers might find offensive.
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*This is a story idea by @arzaylea, This is also a short story*