Almost anyone who has experienced any degree of paralysis can tell you that friends often share questions about your disability once they feel close enough to ask.
While there can be certain considerations to account for with plus-sized sex, they can be easily handled with patience, understanding, a sense of humor and adventure, and the right equipment.
Having great sex after a back injury is all about having a great plan for sex, one predicated on open communication of your needs and wants with your sexual partner.