I believe ‘penetrative’ sex only refers to penetrating the vagina. Anal rape and oral rape is permitted.
I recently read the book Slave (I think that was the title) about a Sudanese Muslim child taken from her village and sold into slavery. According to her, even if they attempt, sometimes the men can’t penetrate the girls because of the very tight sewing done at the children’s genitals mutilation. But the slave owners DID try and sometimes succeed at penetration. It was a life of unbelievable horror. The only reason she got freed is her upper middle class Kuwaiti owners traveled to London and then sold her to London relatives. She spoke, against orders, to a neighbor’s servant who found out she worked 18 hours days for no pay and got her help and extracted her.