The secret is to not just take them back just because their affair ended.... Because then your in a position where. You improved. You changed. They think in their mind you did it for them. So they see it as a lesson you were taught.
Allow them the chance to improve themselves , rebuild the trust and love and become a better partner.
Then you can both explain your boundaries and decide if this is the relationship for the both of you.
Full well knowing that if one crosses a boundary that it will be enforced.
Flowers always make people better, happier, and more helpful; they are sunshine, food and medicine for the soul. unconditional love is awesome!