Have a think but what about trying this...
Write down the routine and tell the girls that you want to start getting this organised for them so that when baby arrives you all know what you are doing...Chat over it with them in a very animated and excited way. THIS IS GOING TO BE FUN !!!!!
This is just a routine idea...
Make her homework time a special time..You could have a pot in the kitchen or wherever that always has a few pens/pencils a rubber and ruler and colouring stuff so doing homework can be started easily.
Make a drink on return from school, Let her have a banana or something whilst the kettle is on making your coffee ( a drink is always handy when helping with homework. It stops you looking as if you are staring over her!) and then sit down at the table with her. You could easily do this with both of them. So long as you are there solely for them and their reading/ writing they won't care you are with them both. It is mostly adults that worry about it being one to one..
Homework done nicely earns TV time for that day. Not done nicely..no TV (even if it means the eldest gets TV and the youngest doesn't. If that happens, I would take her up for an early bath.)
Then tea...engage them in setting table/clearing away after
Then TV...before bathtime but not after. Record programmes they like to watch so that it is always the right time for something on TV rather than just turn on and see what we can goggle at!! Alternatively, know what time their programme starts and make sure they are ready then.
Bath time/ Teethbrush last wee and bed
Once in bed...story or chat time then love you..light out and door shut.
They will know that this is their routine and this is what you will be doing and it will not change for a while.
Good behaviour at bedtime earns a sticker which they can put on their chart as they get into bed. Rudeness after the sticker goes on means it is removed.
Pasta in a see through plastic ( no harm then if thrown)jar is a good reward system for other behaviours downstairs. Once the pasta fills the jar, then a treat is given...cake out..friend over...cinema etc.. according to budget. It should take about a couple of weeks to fill the jar. Remove 1 piece when behaviour is not good.
This is juat all part and parcel of kids growing up. When is your little one due?