Should i?😕

Still I’m stuck in the middle basically... my significant other has a child but in a different state.. we plan on going there end of this year.. i want to message his baby mama to set up something for my significant other to see his child but i dont know if i should.. he would message her himself but he has no phone and she’s blocked him from everything. I wanted to surprise him about this but again i dunno if i should get involved with her and my significant other...