Is Ballbusting by another women other then your wife, girlfriend.... Cheating? What do you all think guys and girls?

Me and girl have been together for sometime and I really love her and the kids with all my heart ,are sex life is great ( another then my penis is alittle to big for her ) but lately she won't really ballbust me besides some light forplay smacking when were having sex, so I been think about getting busting by other women but she thinks that is…