My girlfriend sometimes acts in a strange way. For instance her and my sister (I reckon my sister was the main instigator) once put make up (lipstick etc.) on me while I was asleep and took photographs (I did not mind but thought it was slightly strange!) and my girlfriend also likes to 'feed me'. As in getting food like toast or soup and going "here comes the aeroplane nown!", and feeding it to me and then once I have ate it cuddling me rubbing me belly and saying "good boy!". It is weird but adorable and endearing of her and I do not mind it all, in fact it is nice.
However, tomorrow her and myself are attending quite a formal dinner at my university and I am worried that she might do some antics that while I will appreciate them, will not be well received by everyone else at the dinner. And I am a bit concerned that she might get herself in trouble. Any advice?