the male won't fit in that cave to fertilize the eggs when the time comes... just let your female bp rest for 2 weeks then try it again with your shortbody flowerhorn... Don't rush into breeding fh bro... it will only make you more impatient... 
Patience is the key... When they want to breed, they will... Just enjoy your fish for the time being and besides taking care of a couple hundred fry is very time consuming and takes a lot of work...
Patience is the key... When they want to breed, they will... Just enjoy your fish for the time being and besides taking care of a couple hundred fry is very time consuming and takes a lot of work...