My 3 kids and there dad am I wrong?

Tamika • Hi I am a single mom of 3 kids, I have 2 boys and a girl.
So my 3 kids wanted to spend 4 hours with there dad, I first said no cause i have only 2 days off to spend time with them. Yes my 3 kids live with me but i work 2pm to 10pm i see them off to school Thats it by the time i get Home there all asleep. But then I said fine mommy is only off 2 days then work on Monday they call there dad he says bring them over so I do. Then he text me saying I have to chang3 my plans around now and he is being nice by letting his kids come over when its not his week mind ya he gets them 3very other week and whenever he wante to see them if were not busy he can. To top it off he says if you wanted to spend time with your kids they wouldn't be over here I reply I do want time with my kids but I am not going to stop my kids from getting extra time from there own dad, my dad was never in my life so come on am I pushing my kids on him or should I have said stay home with mommy. I was with there dad since I was 19 to 29 yrs old married for 7 yrs together for 10 years I feel out of love with him cause of his bad choices and laziness