What would happen if I had my kids stay over more often?

I Have split from my partner almost 12 months now, until recently every thing was going fine with the arrangement with our three daughters.

Following our spilt it as taken me almost a year to get myself togehter althrough this period I have had the girls atleast twice a week which was stated to me, I was happy to have them more.

The reason behind our split are due to My partner sleeping with my couson, prior to this people in our family talked about how much our eldest daughter looked like my couson child, even though this was the case I never wanted to query the DNA I was happy to take as mine even if she wasn’t.

My point for making contact is I received a call from CSA 17th September lady was susposely calling me back the following wednesday 24th Sep, explaining ex had made a claim against me, which was out of the blue to me as we had an arangement for the past year the only difference now seems that I have a new partner and now my ex wants to make a claim against me out of zelousy.

She left me and our family home in disgrace having almost destroyed me physically and mentally, and now she wants to destroy my future, she is fully aware of my predicment financially with the debts I pay and don’t have much spare but I was willing to pay half to cost and provide for my children the twice a week I do as well feeding them clothing bathing washing cooking.

I have looked at my financies and realise I could be comprimised by paying out for when she looks after them as well as oaying for when I look after them, plus my added cost as I collect them and drop them every week.

So my query is with the money I would have to pay my ex be reduced if I have my children three times a week instead of the two over nights a week.

To be honest I would happly have them full time and that way my ex wouldn’t have to give me a penny.