Am I wrong ?

So my boyfriend’s bm calls about 3-4 times a day for him to talk to their son(1yo). (NO I DONT HAVE AN ISSUE WITH THAT) but my issue is the excessive calling and when she does call, it’ll be something like she puts their son in the camera for the first 5 minutes or so then faces it to her and just talks and rambles and my boyfriend would sit the phone down to not be in the camera but responds to anything dealing with their son. Then she’ll put the camera back on their son and my bf would pick the phone back up , 2 mins later it’s back on her and she starts rambling on again. Sometimes it’s things that she already told him earlier that day on stuff about their son and he’ll say “yeah I remember you telling me this or that” and I told him he needs to set boundaries because it’s a pattern and she isn’t respecting the fact to let you talk with y’all’s child instead putting herself in the phone with conversations about the child that’s already been had. He has stated that the only times to call is morning before he goes to daycare and at night before bed but before 9:3pm. And she stills calls during the day and doesn’t care and he stops answering then she’ll claim “your son wanted to talk to you” so he’ll call back to talk to him then she’ll pop up minutes later with her shirt hanging off her shoulders, setting the phone up as she walks around the house and he would hang up . Then she tried to guilt trip him saying “you hung up on your son” when their son would be in the living room or something and she would have the phone & he wouldn’t respond to that text. Am I wrong for telling/asking him to add stricter boundaries?? ( I know it’s not my place but as the girlfriend, I feel like it’s disrespectful in a way) and he tries not to be too hard because he’s afraid she’ll take his son away from him if he be more aggressive with telling her not to call unless it has something to do with the child only. He doesn’t know how she’ll react and I don’t want her to become bitter behind it neither.