Talk to him about your concerns in a calm and rational way, explaining how you feel and how you're feeling through no fault of his own.
The fear you have is likely damaging your relationship because you're consciously or unconsciously holding back in fear that you will be cheated on again.
And see if there's a therapist you can go to individually and possibly as a couple.
Block both of them and move the fuck on.
Talk to him about your concerns in a calm and rational way, explaining how you feel and how you're feeling through no fault of his own.
The fear you have is likely damaging your relationship because you're consciously or unconsciously holding back in fear that you will be cheated on again.
And see if there's a therapist you can go to individually and possibly as a couple.
If I finish in her mouth I don't prefer to kiss her after. If not I don't really care, it's just a boundary thing it's really not that big of a deal.