No, "desiring" does not generally imply "allowing." It is easy to think of cases in which a person desiring something might not necessarily allow it, or would at least want to be asked for permission before allowing it.
Here are some examples grounded in contemporary discourse regarding sexual rights:
(Ex. 1) Suppose Alice desires to sleep with Bob. But Alice, for personal reasons, is also determined not to sleep with anyone, which trumps her desire to sleep with Bob. Consequently, she will not allow Bob to sleep with her, even though she may desire it.
(Ex. 2) Suppose Alice wants to sleep with Bob. Alice tells Bob this. Bob tells Alice that he desires to sleep with her. Even though mutual desire has been established, both parties should obtain express consent from the other party. There are many good reasons for this, one of them being to prevent misunderstandings. Strictly legally speaking, neither party may presume that desire implies permission.