It sounds as though she's just not interested yet, kelly58. He'll be interested to get to know her and sniff her, but on one day out of the next 17, she will return his interest!
Could you put her in with the tup and put her wether in with them also, so she has her friend with her to settle her? And yes, put her in, turn your back and ignore her pleas to fetch her back out! Leave her in with the tup for 18 days at least.
Cheviot cross Boreray would be a very interesting fleece...
(Got some Cheviot dyed and drying now - it's dyed beautifully and I haven't seen any other fibre so very resistant to wet felting, so it's a great one for dyeing.)