A vampire kills a woman by biting her chest just below the collarbone and drinking her blood, which she obviously enjoys. This is shot as a sensual love scene but is not overtly sexual at all. (Quite unlike the outright sexual element in "Blade")
A human enters a bar which is a hideout for vampires. One of the vampires notices she has no marks and she replies, "You haven't seen the rest of my body." To which a female vampire says, "Is that an invitation?"
Some mildly sexual scenes:
Two girl (groupies) are brought to Lestat. He seduces them but nothing sexual occurs.
A woman tried to coax Lestat to suck her blood by making a small cut on her chest above her breast.
A non-graphic, no nudity scene between two vampires. They are together in a bath covered in rose petals. She rises from the water, indicating oral sex may have occurred.