The most erotic and hottest "actions" for me are:
- my wife dominating me to watch her sucking a cock from very nearby (5-15 centimeters)
- my wife pushing then that cock in my mouth
- putting her lovers cock in her pussy (of course fluffing him first)
- watching then and/or licking her while he fucks her
- fucking my wife after her lover has finished in her
- last but not least: knowing how she loves all these extremely, so to satisfy her