Am I getting somewhere?

Last week I took a pair of mums knickers from her wash bin and did the usual son thing had a sniff and wanked over them. This time i did something I never did before. I cum in them and put them back in her washing,This morning I went for a shower and laying on the top of the dresser was another pair of mums knickers. This is something she has never been in habit of doing before. On inspection it was obvious she had been rubbing them into herself and had left an amazing aroma on them. I showered after wanking with them and leaving them in different place with traces of my cum in them. It is something I have always been wary of doing as I was never sure what the maybe embarrassing or awkward consequences may of been, but thought it worth a chance. Visiting the bathroom half an hour later they had been removed and I went off to work. In the evening mum, nan and I, having eaten, were sitting watching TV and mum plonked herself next to me on the sofa and into my ear says 'I see you enjoyed your shower this morning'. Before I had time to compose my thoughts she was up and carrying on as if it was normal. Later in the evening I managed to corner her and asked her what she meant. 'I think you know' she said.
I am so confused to be honest. I think I know what she means, at least hope that is what she means but how do I know for sure?
No knickers left in shower this morning.