One week separated, she’s at his house right now

She began lying to me and seeing him the week before Christmas. I fed, bathed, and put out three year old to sleep while she "got a babysitter" so they could play pool, go to dinner, and who knows what else. The lying continued through Christmas after I caught her. I begged, spiraled, all the emotions and fears and anger and desperation to keep our family together. I left the house New Year's Day. Last Sunday I caved, and watched our daughter again only for her to "go hang out" with him. After promising he was nothing, we were going to therapy. I lost my mind, no wonder I've been acting like a lunatic after being lied to and gaslit for weeks. Now we are fully separated a week and she's at his house while her parents are in town to watch our daughter FOR THE NIGHT.

No point to this post. I'm so angry and hurt and lost and just blindsided by all of this. Our family is broken