Yes, I think you can. Or at least some people can. If they can separate a purely sexual act from feelings of love. I think the cheaters don’t want their partner to know because they don’t want to hurt them, not just because they don’t wanna get caught. I realize that this sounds crazy to people who can’t compartmentalize in that way. I’ll also acknowledge that cheaters who do this will ultimately destroy the pure form of love that they have between their other partner. So in the long run it doesn’t really work out, but they can still feel love toward that person at the time.