Hey moms!

So I have a now 5 month old baby girl. I do not have a problem with people holding her, I have a problem with the way people (her dads family) grab her from my arms. There was a family party a couple weeks ago and I could not stand when they would come up and take her from my arms without asking. I know she’s not in danger and it was one night so I let it slide. A lot of people would ask to hold her and that’s what I prefer. There’s another family gathering in 2 weeks and I was wondering is there a nice way to let people know not to grab her from my arms?! I can come off as rude. So to all my moms out there, how do I tell people to ask?