First time throuple, how to deal with these feelings of jealousy and insecurity?

Brinadarlingxx

My husband kind of sprung up the fact that he found a girl who was interested in him and interested in meeting me. We all talked through text. She is learning English and I am learning Spanish. Whereas they both speak fluent Spanish. It’s harder for me and her to communicate but I use google translate and have been trying to get to know her. She doesn’t seem to be trying to get to know me as much. I didn’t mean to but I showed my insecurity with a question that wasn’t supposed to be asked. I guess. The language barrier makes it difficult enough. Him and her talk a lot and have gotten pretty close. He tells her she is his and calls her pet names like “love”. Im having a hard time with my jealousy. I accept the fact that he is basically dating her, we are suppose to be doing this together. But they both live in Mexico and me in the US. So I accept that they are going to be together even when I’m not around but it feels like I am the one on the sidelines because they have gotten so close so fast. She had to cancel our date because of work and only told him. I know it’s not a big deal but we all are supposed to be dating or getting to know each other. We were all going on a date together but when she had to cancel she didn’t say a word to me about it. As if I wasn’t a part of it. I even asked her “hey you can’t go to the beach tomorrow?:/“

she left me on read.
They talked for a few days before I even knew about it and to my surprise I went along with it. I’m trying to get to know this girl and to talk with her but she doesn’t reciprocate. It’s clear she obviously likes my husband more than me, because they do speak the same language and he is a great guy and he showed her that. But come on man.

Updates
1 y
So I told her she can text me in Spanish if she needs to say something she doesn’t know how in English because I use google translator anyways. Maybe that’s why she didn’t text much? Because she was trying English and can only say so much. I don't know. But anyways I’m not ready for her to be here at our house when I’m not here.
Updates
1 y
I don’t even think I’m ready for us 3 to have relations in the bedroom yet. Once she comes over, even if I’m here the first time she’s probably going to come over when she wants after that. That’s what concerns me is when it comes up I’m going to want to say no and I already told him I’m not ready for that. As myself I need to take it slow, learning to share my husband and deal with these feelings. He is extremely defensive and it’s hard for us to communicate without someone fighting.
First time throuple, how to deal with these feelings of jealousy and insecurity?
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