Neighbor is claiming water damage after storm

[Lindsey Allen]

I own a small rowhouse in Philly, purchased it last November, rented it March 1st. It was essentially a turnkey - it was flipped right before I purchased it (side note, thIs is all new and I didn’t know at the time this wasn’t the smartest investment...learning the hard way). Turns out it is unfortunately among the many rowhouses that experiences a wet/flooded basement when there’s a heavy storm. Did not know this untol our tenants alerted us of water. Last weekend we had a major rain event and we got significant water (2-3 in at the deepest in the front half of the basement). Realized the back patio drain was covered with debris and are hoping that was the cause for the flooded basement. One of our neighbors is blaming the water in her basement on the flooding that happened at our house. Claims that in the 40 years shes lived there she never had water until the house was renovated last year. She apparently had an issue before I purchased the house and sealed (cemented) her basement walls in response. Her plumber came by on Monday and assured her that her pipes are fine. She blames it on the shoddy construction that apparently occurred when the house was being flipped. Claims water was coming through the party wall near the floor about in the middle of the house, not from the back of her basement. My contractor took a look at both propertIes and said it’s possible that the blocked patio drain (which is adjacent to the party wall) could have caused water to infiltrate her basement, but he couldn’t be certaIn and how do you tell? she Is askIng that we replace the carpet In her basement ($600 or so, she says) and seal the portion of her wall she says is where the water was coming in. I want to be a decent neighbor, but how do I proceed without setting a precedent that we will do this in the future, since we are doing what we think needs to be done to resolve the issue on our end (exploring basement drainage improvements and keeping the drain clear). She’s mentioned insurance and lawyers and I’m not sure she’ll reason much with me. Looking for some advise. Thanks!