Regarding Parents Arguing

its a really vulnerable topic for me never really talked to anyone about it since im almost 20 now currently 19. Its a long story but il try my best to explain in short so my dad who’s age 52 and my mom who’s 46 been having arguments for the past 4-5 years my dad has also hit my mom once so basically my mom thinks my dad does wrong doings like she thinks he’s cheating talking to other women’s in the office i think my mom had also caught my dad once doing something i don’t remember what exactly but it was related to him texting his lady colleague i am not sure about the whole story i just know partly my dad had previously apologized as well i do really trust my dad i don’t think he would do anything like that ever after that incident my mom still thinks he’s still the same my mom mostly starts the argument she suspects him a lot even if he’s going for a small walk in the evening in short my mom still suspects him for no reason basically even i think that its stupid but i don’t wanna get involved so i wanted suggestion what i should do if i should talk to my dad about it or not would mean a lot if i can get sm idea what i must do

TL;DR:My mom suspects my dad for no reason at some times even though he had apologized due do him talking to his lady colleagues i do completely trust my dad..