My daughter 26 is in love with a married Muslim brother who is pious. he requires time 2 settle his personal matters before proposing. Another pious Muslim brother, single, made a proposal 2. She likes the married guy but her mum dislike him. Mum forcing.
Your letter implies that the married party has not proposed yet. So the proposal of the single party is the one and only proposal, not a second proposal. Since the latter is also pious, then the Sunna is clear that the parents should view it as acceptable and God-sent.
Hajj Gibril Haddad