I would think you would treat them the same way you treated them before they came out and be 100% open to whatever future developments might occur like shopping for whatever they might need... especially if they asked. They are a friend and friends have each others backs regardless of gender identity, right?

For the record i have no CD tendencies nor am i transgender, i am simply here to learn and be a friend to my friend who is transgender and YES, i went shopping with my friend. Well okay, i did my version of shopping, which was me and my 2 boys followed the women (Wife, Eva and my 2 girls) around while they shopped. Me and the boys tried to entertain ourselves and stills stay out of trouble, mostly successfully i might add.