Kirsten, this sounds EXACTLY like the situation my Toby and Lily had. Only it was the other way around - Lily was showing TOBY who was boss She bossed him around! Evertime she would see him she would hiss at him, and, after time they began swiping at each other. I tried separating them, but Toby/Lily would scratch at the door constantly - the thing is it seemed like even though they appeared to hate each other, they wanted to be next to each other =/ Toby would always try to sniff her, and when she noticed, she would hiss and swipe at him. Toby would usually back off, until he finally started fighting back - thats when things started to improve in their relationship

Toby acted strangely first when Lily was around. I would try to pet him or pick him up and he would growl at ME! I'd say just give Luna her space, and when she comes to YOU for affection, give her extra! Let them wrestle ..I think they have to work out their differences

It didn't take my furkids long to accept the fact that they had to live together, and give it time, I'm sure yours will too. Mine still aren't huge cuddlers, but they get along great now.