What doubt could remain, then, as to the alternative?
What doubt of the atrocious nature of his designs and intentions towards her?
No doubt at all.

Ought she not, therefore, with the intensest scorn of what-do-you-take-me-for-sir indignation to have repelled the insult offered to her?
Poor Paolina had no conception that any insult at all was offered to her or intended.

Ludovico was minded to offer to her that which it was in his power to offer, for her to accept if it suited her, or to decline if it suited her not.

The species of tie that he offered her was all he could offer her.

It was one very frequently offered and very frequently accepted in similar cases.