Tenants claim sickness and lost wages

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My brother and I own a single family home. The tenants have been there since 2022. Recently, we had a leak from the A/C in the attic. The Condensation drain line was plugged up and managed to leak through the ceiling onto the second floor on the home. Water kept overfilling in the attic, creating standstill water, which created some mold.  We took care of everything in a span of two months and the mold was remediated. The tenants sent one picture of a spec of mold on the wall and that was it. Around the time the mold was getting cleared up, the tenants complained that they were all getting sick and their kid was on a breathing machine. There is no proof for this other than a text message. The tenants want $300 bucks off their rent for two months. Our lawyer had stated we go along with what the tenants want and to make them sign a settlement statement. Any advice on this?