My mom thinks my dad may be cheating and I dont know what to
I'm 19 turning 20 and they have been married for about 26 years. My mom vented to me that she thinks my dad is cheating but she always tells me don't say anything about it. She also says she's been thinking it's been going on for awhile but she trust that he wouldn't do that to her. She has also cought him pictures in is phone that she says " he shouldn't have". But she also says he doesn't show her any love like she wants him to and she tells him that I've even heard her say it a couple of times to him. There both over 50. We recently just went on a vacation and I think it really made her upset cause she said he doesn't show her love. But I also hear my dad talk about my mom allot and in ways that anyone could tell he loves her. Is there anything I should be says about the situation or should I just let it play out.