Co-parenting

Does it get any easier? I'm so stressed it's ridiculous.

So my daughters father suddenly got married to a woman out of the blue. The marriage isn't legal he's Muslim and they went to the masjid to get married. He moved in with this woman when my daughter (who is almost 2) stays over there she is sharing a room

with his wife's 6 year old son who is not blood related to my daughter. I don't feel comfortable with my daughter sharing a room with him because of the age difference plus he's a boy and they are not biologically siblings. My daughters dad has his own place but he left and moved in with this girl never told me where was staying and has my child there without my knowledge. I asked him did my daughter have her own room, he lied and said she did and I found out through his sister that she didn't. This whole marriage thing is really a slap in the face because we just stopped dealing with eachother and he was begging me to move in with him just a few months ago. I just feel like hes sprinting all this on me at once and it's a lot to take him. First he's married, my daughter is around strangers that I never met before and now they live together. We always agreed that if we moved on and got in new relationships we would always respect one another and we would always meet that person before getting our daughter involved. All of this is too much I'm so hurt, stressed and depressed and I need advice on how to handle this situation. All I want is proper communication with him as her mother I deserve to know these things.