I'm from Country X but I moved here when I was 14 so effectively speak fluent English and I'm fully bilingual. I realise what a privilege it is and want my children to be bilingual too.
I've got 2 DDs - 2.5yrs and 7mo. The youngest one doesn't speak, the older one speaks X language better (says mini phrases in X but only single words in English). We've committed to doing one parent one language so I speak only X to them and my husband speaks only English. I'm a SAHM, neither goes to nursery, DH works full time so mostly they're just around me.
DH is close to his family so we see them about once a month. Every time I speak to either of my DDs in X they give me a look as if to say "huh?" or "you doing it again?" (Ie speaking in a language we don't understand) or they'll stop their own conversation and stare at me if for example they're talking and I say something to her like "let's put a jumper on" or "don't touch that" etc. Obviously my children's abilities and making them bilingual is far more important than making PILs comfortable. But still makes me feel horrible like they're all judging me and hate me.
DH says he doesn't notice it. Definitely there though. He's quite close to his family and scared to offend them.