My SO usually orders at restaurants when we go out. She puts her name down at the wait list. She used to help fill in the blanks a lot. But I talked to her about it some time back. I told her that it's an easy escape for me if she keeps doing the work that I need to be able to do. So now, when I am asked my name or whatever information, she doesn't interrupt or finish my sentence for me, she lets me stutter and say it myself. Thinking of this, I am going to make it a point to tell her that from now on, I will do the ordering whenever we go out. Ideally, one should want to face their fears and get over them. And that has to come from within ourselves. So when we know that we're uncomfortable to talk in a situation, we should try and spearhead through that fear. Or, we could always fall into complacency and just be comfortable with our partners talking for us. Maybe, you could help him break out of the comfort zone by saying something like "it's been a long time since you order or booked a table for us! why don't you do the ordering today?" or "I want you to surprise me with what we're going to eat today! So you do the selecting and ordering!". This would be a subtle nudge for him to face his fears. You are just being your caring and loving self by helping him when it seems like he's in need of help. But honestly, it doesn't do stutterers any good when others complete their sentences for them. In the short run, it may seem to them that they've escaped the uncomfortable situation, but then you become their crutch. You have to understand that this is not what your intention is and in no way should you blame yourself. You are just helping him out. Though, that little help does more harm in the long run. It is not possible to know this as a non-stutterer. SO, to finally answer your question, it is normal for a partner of someone who has a stutter to help fill in the blanks for them, a little or even full sentences or to give them a pass and do all talking on their behalf. But is it good for the stutterer in the long run? I don't think so.