That is hard to tell because you don't tell us the age of your rabbit or your cousin's rabbit.
If both are over 3 months - then yes, there is a good chance that yourcousin's rabbit is pregnant. What type of rabbit is yourcousin's rabbit? I hope it is bigger than yours because itcan have a hard time with delivery if it isn't...
If its a polishand the female os biggeryou dont have a sizeworry , BUT , you dohave a pregnancy worry , chances arehigh that she could havebecome pregnant , expect babiesaround day 31 .
Why was there a need for 2 posts on thesame subject use one threadplease so we can help youbetter .