Are there sexual acts that are sinful after marriage between a husband and wife?
Yes.
Lust is not reserved for only the single person's mind. Lust can occur in a marriage whereby a spouse attempts to sexually "use" their partner for their own selfish pleasure without regard for the other's desires. Also, sexual intimacy between a husband and wife, if it is God-honoring, needs to be mutually satisfying, promote emotional and spiritual intimacy, and involve mutually agreeable activities. Any such violation of these principles could be deemed sinful since it would not promote the oneness God designed marriage to become. But concerning what those specific sexual acts are that might be considered sinful, that varies from couple to couple because what one couple may agree on sexually another couple might not. God has reserved the marriage bed for freedom and exploration in the context of safety, commitment, selflessness, and love.