My suggestion would be that if you opt to let the lovers be together, you should have a chance to talk the father into accepting it. If you succeed, you don't get any money but you do get the relationship gain. If you fail your conversation checks, you get one more option where you offer up a dowry, something like 2k gold or whatever 'sizable enough to noticed' is once economics gets balanced out, to get him to grudgingly go along with it (no relationship gain, but still quest exp) or just accept the loss (proper failure, relationship loss, no reward, ect...).