Share taxes money

Hi,what do y'all think, should give my baby daddy some money ,we leave together and I got some money we have a son and we split every bill sometime I pay more because he doesn't know how to save when he gets money, he buys our son some clothes, shoes and food sometimes ,I didn't tell him I got a refund or how much I got,and my plan was to buy my son school supplies and everything he needed for school since he is starting this year and save the rest for our son ,what do y'all think should I give him something?because I'm scared if I do tell him how much I got he going to start having excuses to call out from work and start planning unnecessary spending every time and we have been falling on hard times and I was the one always keeping everything up