Should I be supportive/optimistic about my mom dating a much younger guy? I so how can I change my mindset to become that way?

Anonymous
Should I be supportive/optimistic about my mom dating a much younger guy? I so how can I change my mindset to become that way?
My mom's been dating a much younger guy (he's 26. She's 42). When I found out about the age gap I assumed she just wanted a fling with a hot young guy. When I found out that wasn't the case/she's dating him with the hope of the relationship becoming long term I became very concerned. Firstly, I think it's just plain weird. He's closer to my age than hers. There are a couple times I came to my mom's home (she gave me a key) and heard them having sex upstairs (my mom is super loud). I wanted to throw up.
But there are more substantive concerns I have as well.
1. They're in very different stages of life and likely could have very different life goals.
2. My mom's a successful real estate agent and he's a poor grad student. I'm worried he may at least partially be dating her for her money.
3. She may be dating him as a consequence of a mid life crisis. She's always been a hopeless romantic. I think that the fact she's 42 and none of her relationships have worked may have sparked a mid life crisis.
4. I know she's always wanted another kid. I'm suspicious she thinks being with a younger guy will increase her chances of pregnancy (if they get that far)
I've talked to my mom about my concerns. She explained why each of them were either non-existent or have been figured out by her. She didn't tell me directly, but I could easily tell she desperately wants me to be supportive/happy/confident about her relationship. I know the rest of her family isn't supportive/thinks this is weird&that really bothers her. I want to be confident/happy/supportive and I feel bad/guilty that I'm not. I do think the age gap is weird and I think the chances this relationship works out long term are very low. Am I wrong for being weirded out by their relationship? Are the chances it lasts better than I think? I want to be confident/happy/supportive for my mom, but I just don't think I'm there yet.
Should I be supportive/optimistic about my mom dating a much younger guy? I so how can I change my mindset to become that way?
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