So I did a little testing because the vet isn't free until later on tonight and I put a known female calico spotnose in with the supposed female and the calico spot immediately started tail wagging and scenting but the supposed female isn't showing any interest what so ever but isn't thrashing either.

Note i've only had them together for about 40 minutes but it was a huge difference from what she (supposed female) was doing last night.

Stonger evidence that she might be male I suppose?