I've also got a few suggestions for line changes. Let me know what you think about them.
Page 126
>だからって 適当にしたら お客さんには 伝わると思う
>"So just play it by ear. I think the customer will communicate with you."
With this line, I think this translation is just a little off. I think 適当 here means "properly", and "customer" is the target of 伝わる. So it should be more like this:
>"So, as long as you try your best, I think the customer will understand."
Page 127
>"nuzzle up to it"
This just sounds a little odd to me, maybe "snuggle up to it" or "embrace it" would be better?
Page 130
>"Izumi-san? First time with her?"
The second part of this line isn't a question, it's a statement. I think she's saying it's Izumi-san's first time requesting a threesome. Not entirely sure with this one though.
Page 132
>"Wait, sorry,"
I'm pretty sure 失礼します is being used here as just a performative phrase for entering someone else's space, not literally as "sorry". More like "we're here", or "may we come in?"
Page 136
>"But..."
I think you may have misread this. It's ども, not でも. It continues into the line on the next page, Miya is saying "domo arigatou gozaimashita", so just "thank you very much." Not sure exactly how to divide that between the pages, maybe "really..." /"thank you very much." or "thank you..."/ "so much."