how do i make my kitten an outside cat without her going to far and leaving my husband found her at work about a week ago outside the vet said she was in good health and all so we keep her but i'm prego so i can't change the litter box and well my husband just doesnt want to lol so i need a bit of help lol

i don't mean for her to be outside all the time just to go potty lol i love to cuddle with her at night in bed we've already gotten close and i don't want to give her away i just want her to potty outside.