MRI controller elected not to issue go around instructions to landing traffic with an aircraft clearing the landing runway because of multiple previous landing attempts by the landing aircraft; the reporter noting an anxious pilot who needed to land.

Narrative

Prior to Aircraft X contacting Merrill (MRI) inbound to the field; FBO requested we sequence Aircraft X into Runway 34. I sequenced Aircraft X into Runway 34. Aircraft X extended left base into Lake Hood's (LHD) airspace and I/we attempted to coordinate with LHD. I instructed Aircraft X to turn left base as the aircraft appeared to fly a more 'U' shaped pattern which placed the aircraft in LHD's airspace. On short final Aircraft X stated going around. I gave Aircraft X the wind 010 at 7 knots and a left turn entry for Runway 7 or 34 per their request. After no response I sequenced and cleared Aircraft X to land on Runway 7 or 34 and I gave the aircraft the wind again and asked which runway was preferred. Aircraft X came in high and fast on final again for Runway 34 and went around again. I gave Aircraft X the wind and runway choice again. Aircraft X flew through Runway 7 final and I asked Aircraft X if they would follow Aircraft Y for Runway 7. Aircraft X stated yes and followed Aircraft Y. Though I knew Aircraft Y would not be clear of Runway 7 before Aircraft X crossed the threshold; I purposely did not send Aircraft X around and I stated so to all cab personnel because I felt it was the safest operation to have Aircraft X land without incident versus get more anxious as the pilot was already stressed. Recommendation; I could have sent Aircraft X around again to have adequate spacing. However; I know if I were presented with the same scenario I would again do the same by allowing Aircraft X to land. I do not like to bend the rules but I do see the benefit my choice had for Aircraft X.